What can be used to pressurize a chiller system before opening the system for a non-major repair?

Controlled hot water can be used to pressurize a system for the purpose of opening the system for a non-major repair purpose of opening the system for a non-major repair.

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Which of the following methods can be used to pressurize an r1233zd system for the purpose of opening the system for a non-major repair?
Why do chillers using low pressure refrigerants require purge units?
The purpose of the purge unit on a low pressure chiller is to
Remove non condensable gases from the top of the condenser
The rupture disc of a low pressure chiller is connected to the
What is the maximum pressure to which one should pressurize an r11 chiller in order to leak test it
What must be done to the oil in a chiller sump before removing it
Must be heated to 130* to drive out any refrigerant
An r11 centrifugal chiller is charged through the valve located at the
Bottom of the evaporator barrel
300 ton, r123 chiller supplying chilled water for conditioning a library must be repaired if it leaks at a rate of more than __ annually
A 1,000 ton, low pressure chiller used to cool water must not be allowed to leak refrigerant at a rate greater than __ of its total charge annually without being repaired
Low side pressure in a r11 chiller which is providing 45*F chilled water for a/c would be
When disposing of a r123 chiller, the refrigerant must be removed down to a pressure of __ before being dismantled
If the oil sump in a centrifugal chiller is not heated during refrigerant recovery, what can be the result
After required recovery is reached, system pressure may rise again
How are water tube leaks found in low pressure chillers
Reward for providing information leading to the conviction of someone violating section 608of the clean air act can be as much as
$10,000 per day per violation
What can happen to a low pressure chillers evaporator tubes if water is allowed to stand in them during refrigerant recovery
If a recovery machine is being used to pressurize a system to recover liquid refrigerant, what can happen if it discharges at a pressure greater than 15psig
It can burst the rupture disc on the chiller
The discharge from a purge unit should be piped where
Excessive purging from a chiller purge system can be an indication of
Non condensable gases leaking into the chiller
Using a controlled hot water pressurization system to raise the chillers pressure to atmospheric in order to replace a non major component of the chiller is
Which refrigerant is an interim, retrofit replacement for r11in low pressure chillers
After recovering just the liquid refrigerant from a 350 ton r11 chiller how much refrigerant would still be in the system in vapor form
R123 is classified by ASHRAE as a __ refrigerant with regard to its toxicity and flammability
How should one remove frost from the sight glass of a chiller
Recovery machines used for low pressure systems will use what water source to cool their internal condensers
The preferred method for pressurizing a low pressure chiller for leak testing would be to
Use a controlled heated water system to warm the chiller up
Because a low pressure system operates below atmospheric pressure, leaks in the
Gaskets or fittings will cause air and moisture to enter the system
When charging a system with a low pressure, refrigerant should be introduced as a vapor to raise saturation temperature to a minimum of
EPA required evacuation levels for recovery of recycling equipment manufactured or imported on or after Nov. 15, 93 is
If a strong odor is detected during the recovery process
A compressor burn out may have occurred
A low pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of __ of the total charge
A rupture disc for a low pressure chiller will rupture at
What refrigerant has a safety classification of B1
When installing more than one, pressure relief valves must be installed
When pressurizing a system do not exceed
ASHRAE 34 standard safety classifies r134a as
After reaching the required vacuum on an appliance when servicing, moisture is indicated by
Multiple rises in pressure with an increase of pauses between rises
In a chiller, air and other non condensable collect
At the top section of the condenser
Who establishes the refrigerant safety group standard
What type of equipment can be worked on with type 3 certification
To repair a chiller operating with r22 a technician must have a
The owner must keep records of refrigerant added during service and maintenance on equipment with charges of __
After all the liquid has been removed from an average 350 ton approximately how much vapor refrigerant remains in the system
Where is the purge unit located in a low pressure system
When leak testing a low pressure chiller, the max pressure to use is
During evacuation of systems with large amounts of water, it may be necessary to
Increase pressure by introducing nitrogen to counteract freezing
What can be used to pressurize a chiller system before opening the system for a non major repair
Refrigerant recovery from a system using r11 or r123 starts with
Liquid removal followed by vapor recovery
The standard for machine room safety is
The most efficient method of leak checking a charged low pressure refrigeration unit is to
Pressurize the system by the use of controlled hot water or heater blankets
EPA required evacuation levels for recovery or recycling equipment manufactured or imported before Nov. 15, 93 is
In an equipment room containing a r123 chiller a refrigerant specific sensor must be used to warn of leaks
When recharging an evacuated chiller with r11, vapor must first be introduced until the pressure in the chiller exceeds __ in order to make sure that water doesn't freeze in the evaporator tubes

Which of the following methods can be used to pressurize an r1233zd system for the purpose of opening the system for a non-major repair?

Which of the following methods can be used to pressurize an R-1233zd system for the purpose of opening the system for a non-major repair? warming the liquid refrigerant in the system . These systems operate below atmospheric pressure.

When charging a chiller refrigerant vapor is introduced into the system before charging with liquid This is because?

11. When charging a chiller, refrigerant vapor is introduced into the system before charging with liquid. This is because: A) Vapor charging increases pressure slowly, preventing failure of the rupture disk.

What is the primary water source for a recovery unit?

Correct answer is C: the local municipal water supply. The primary water source for a recovery unit condensing coil is the local municipal water supply.

What is typical advantage of water cooled recovery unit?

Water-Cooled Recovery Units are most common while recovering refrigerant from a chiller system. The advantages of these units are: Faster Recovery. A large amount of refrigerant can be recovered easily and quickly.

This preview shows page 46 – 49 out of 60 pages. Refrigerant should be removed from the condenser outlet if the condenser is below the receiver. In a building that has an air-cooled condenser on the roof and an evaporator on the first floor, recovery should begin from the liquid line entering the evaporator.

Why do chillers using low pressure refrigerants require purge units?

Why do chillers using low-pressure refrigerants require purge units? These systems require the removal of contaminated refrigerant. These systems operate below atmospheric pressure. Purge units remove refrigerant from the oil sump.

What is a typical advantage of water cooled recovery unit?

The purpose of the purge unit on a low pressure chiller is to

Remove non condensable gases from the top of the condenser

The rupture disc of a low pressure chiller is connected to the

What is the maximum pressure to which one should pressurize an r11 chiller in order to leak test it

What must be done to the oil in a chiller sump before removing it

Must be heated to 130* to drive out any refrigerant

An r11 centrifugal chiller is charged through the valve located at the

Bottom of the evaporator barrel

300 ton, r123 chiller supplying chilled water for conditioning a library must be repaired if it leaks at a rate of more than __ annually

A 1,000 ton, low pressure chiller used to cool water must not be allowed to leak refrigerant at a rate greater than __ of its total charge annually without being repaired

Low side pressure in a r11 chiller which is providing 45*F chilled water for a/c would be

When disposing of a r123 chiller, the refrigerant must be removed down to a pressure of __ before being dismantled

If the oil sump in a centrifugal chiller is not heated during refrigerant recovery, what can be the result

After required recovery is reached, system pressure may rise again

How are water tube leaks found in low pressure chillers

Reward for providing information leading to the conviction of someone violating section 608of the clean air act can be as much as

$10,000 per day per violation

What can happen to a low pressure chillers evaporator tubes if water is allowed to stand in them during refrigerant recovery

If a recovery machine is being used to pressurize a system to recover liquid refrigerant, what can happen if it discharges at a pressure greater than 15psig

It can burst the rupture disc on the chiller

The discharge from a purge unit should be piped where

Excessive purging from a chiller purge system can be an indication of

Non condensable gases leaking into the chiller

Using a controlled hot water pressurization system to raise the chillers pressure to atmospheric in order to replace a non major component of the chiller is

Which refrigerant is an interim, retrofit replacement for r11in low pressure chillers

After recovering just the liquid refrigerant from a 350 ton r11 chiller how much refrigerant would still be in the system in vapor form

R123 is classified by ASHRAE as a __ refrigerant with regard to its toxicity and flammability

How should one remove frost from the sight glass of a chiller

Recovery machines used for low pressure systems will use what water source to cool their internal condensers

The preferred method for pressurizing a low pressure chiller for leak testing would be to

Use a controlled heated water system to warm the chiller up

Because a low pressure system operates below atmospheric pressure, leaks in the

Gaskets or fittings will cause air and moisture to enter the system

When charging a system with a low pressure, refrigerant should be introduced as a vapor to raise saturation temperature to a minimum of

EPA required evacuation levels for recovery of recycling equipment manufactured or imported on or after Nov. 15, 93 is

If a strong odor is detected during the recovery process

A compressor burn out may have occurred

A low pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of __ of the total charge

A rupture disc for a low pressure chiller will rupture at

What refrigerant has a safety classification of B1

When installing more than one, pressure relief valves must be installed

When pressurizing a system do not exceed

ASHRAE 34 standard safety classifies r134a as

After reaching the required vacuum on an appliance when servicing, moisture is indicated by

Multiple rises in pressure with an increase of pauses between rises

In a chiller, air and other non condensable collect

At the top section of the condenser

Who establishes the refrigerant safety group standard

What type of equipment can be worked on with type 3 certification

To repair a chiller operating with r22 a technician must have a

The owner must keep records of refrigerant added during service and maintenance on equipment with charges of __

After all the liquid has been removed from an average 350 ton approximately how much vapor refrigerant remains in the system

Where is the purge unit located in a low pressure system

When leak testing a low pressure chiller, the max pressure to use is

During evacuation of systems with large amounts of water, it may be necessary to

Increase pressure by introducing nitrogen to counteract freezing