Warning, Caution – Carrier 48/50PD05 User Manual

Page 60

UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal

injury, death and/or equipment damage.
Puronr (R--410A) refrigerant systems operate at higher

pressures than standard R--22 systems. Do not use R--22

service equipment or components on Puron refrigerant

equipment.

WARNING

FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal

injury, death and/or property damage.
1. Improper installation, adjustment, alteration, service,

or maintenance can cause property damage, personal

injury, or loss of life. Refer to the User’s Information

Manual provided with this unit for more details.

2. Do not store or use gasoline or other flammable

vapors and liquids in the vicinity of this or any other

appliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any

phone in your building.

3. IMMEDIATELY call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s

instructions.

4. If you cannot reach your gas supplier, call the fire

department.

WARNING

FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal

injury or death.
Disconnect gas piping from unit when pressure testing at

pressure greater than 0.5 psig. Pressures greater than

0.5 psig will cause gas valve damage resulting in hazardous

condition. If gas valve is subjected to pressure greater than

0.5 psig, it must be replaced before use. When pressure

testing field-supplied gas piping at pressures of 0.5 psig or

less, a unit connected to such piping must be isolated by

closing the manual gas valve(s).

WARNING

Cleaning

Inspect unit interior at beginning of each heating and cooling

season and as operating conditions require. Remove unit top panel

and/or side panels for access to unit interior.

Coil Maintenance and Cleaning Recommendation

Routine cleaning of coil surfaces is essential to maintain proper

operation of the unit. Elimination of contamination and removal of
harmful residues will greatly increase the life of the coil and extend

the life of the unit. The following maintenance and cleaning

procedures are recommended as part of the routine maintenance
activities to extend the life of the coil.

Remove Surface Loaded Fibers
Surface loaded fibers or dirt should be removed with a vacuum

cleaner. If a vacuum cleaner is not available, a soft non-metallic
bristle brush may be used. In either case, the tool should be applied

in the direction of the fins. Coil surfaces can be easily damaged (fin
edges can be easily bent over and damage to the coating of a

protected coil) if the tool is applied across the fins.
IMPORTANT: Use of a water stream, such as a garden hose,
against a surface loaded coil will drive the fibers and dirt into the
coil. This will make cleaning efforts more difficult. Surface loaded
fibers must be completely removed prior to using low velocity
clean water rinse.
Periodic Clean Water Rinse
A periodic clean water rinse is very beneficial for coils that are
applied in coastal or industrial environments. However, it is very

important that the water rinse is made with very low velocity water
stream to avoid damaging the fin edges. Monthly cleaning as

described below is recommended.
Routine Cleaning of Round--Tube Coil Surfaces
Monthly cleaning with Totaline® environmentally sound coil

cleaner is essential to extend the life of coils. This cleaner is

available from Carrier Replacement parts division as part number

P902--0301 for a one gallon container, and part number
P902--0305 for a 5 gallon container. It is recommended that all

round--tube coils, including standard aluminum, pre-coated,
copper/copper or E-coated coils be cleaned with the Totaline

environmentally sound coil cleaner as described below. Coil

cleaning should be part of the unit’s regularly scheduled
maintenance procedures to ensure long life of the coil. Failure to

clean the coils may result in reduced durability in the environment.
Avoid the use of:

coil brighteners

acid cleaning prior to painting

high pressure washers

poor quality water for cleaning

Totaline environmentally sound coil cleaner is non-flammable,

hypoallergenic,

non--bacterial,

and

USDA

accepted

biodegradable agent that will not harm the coil or surrounding

components such as electrical wiring, painted metal surfaces, or
insulation. Use of non-recommended coil cleaners is strongly

discouraged since coil and unit durability could be affected.
Totaline Environmentally Sound Coil Cleaner Application
Equipment

gallon garden sprayer

water rinse with low velocity spray nozzle

UNIT DAMAGE HAZARD
Failure to follow this caution may result in corrosion and

damage to the unit.
Harsh chemicals, household bleach or acid or basic cleaners

should not be used to clean outdoor or indoor coils of any

kind. These cleaners can be very difficult to rinse out of the

coil and can accelerate corrosion at the fin/tube interface

where dissimilar materials are in contact. If there is dirt

below the surface of the coil, use the Totaline

environmentally sound coil cleaner as described above.

CAUTION

48/

50P