© 2017 Carrier. All rights reserved.
A Carrier Company
Edition Date: 11/17
Catalog No: 42108560002
Replaces: 42108560001
CVH8, HVH8, TVH8, VA9, HVA9, TVA9: APPLICATION GUIDELINE & SERVICE MANUAL
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
40
A95423
Fig. 44 – Bubble Leak Detection
You may use an electronic leak detector designed for specific refrigerant
to check for leaks. (See
.) This unquestionably is the most
efficient and easiest method for checking leaks. There are various types
of electronic leak detectors. Check with manufacturer of equipment for
suitability. Generally speaking, they are portable, lightweight, and
consist of a box with several switches and a probe or sniffer. Detector is
turned on and probe is passed around all fittings and connections in
system. Leak is detected by either the movement of a pointer on detector
dial, a buzzing sound, or a light.
In all instances when a leak is found, system charge must be recovered
and leak repaired before final charging and operation. After leak testing
or leak is repaired, replace liquid line filter drier, evacuate system, and
recharge with correct refrigerant quantity.
Coil Removal
Coils are easy to remove if required for compressor removal, or to
replace coil.
1. Shut off all power to unit.
2. Recover refrigerant from system through service valves.
3. Break vacuum with nitrogen.
4. Remove top cover.
5. Remove screws in base pan to coil grille.
6. Remove coil grille from unit.
7. Remove screws on corner post holding coil tube sheet.
8. Use midget tubing cutter to cut liquid and vapor lines at both sides
of coil. Cut in convenient location for easy reassembly with copper
slip couplings.
9. Lift coil vertically from basepan and carefully place aside.
10. Reverse procedure to reinstall coil.
11. Replace filter drier, evacuate system, recharge, and check for
normal systems operation.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, main electrical
disconnect switch must be in the OFF position. There may be more than
1 disconnect switch. Lock out and tag switch with a suitable warning
label.
LEAK
DETECTOR
SOLUTION
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury or
equipment damage.
Cut tubing to reduce possibility of personal injury and fire.
