Bryant 542J Series, Инструкция по установке, запуску и обслуживанию

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PRE-START-UP
Crankcase heaters are energized as long as there is power to
the unit. Energize heaters 24 hours prior to unit start-up.
Complete Start-Up Checklist on page CL-1 prior to start-up.
WARNING: Failure to observe the following warn-
ings could result in serious personal injury:
1. Follow recognized safety practices and wear pro-
tective goggles when checking or servicing refrig-
erant system.
2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is
in place and secured.
3. Do not remove compressor terminal cover until all
electrical sources have been disconnected.
4. Remove and recover refrigerant from system be-
fore touching or disturbing anything inside termi-
nal box if refrigerant leak is suspected around
compressor terminals.
5. Never attempt to repair soldered connection while
refrigerant system is under pressure.
6. Do not use torch to remove any component. Sys-
tem contains oil and refrigerant under pressure.
To remove a component, wear protective goggles
and proceed as follows:
a. Shut off electrical power to unit.
b. Remove and recover refrigerant from system.
c. Cut component-connecting tubing with tubing
cutter and remove component from unit.
d. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
Proceed as follows to inspect and prepare the unit for initial
start-up:
1. Remove all access panels.
2. Read and follow instructions on all WARNING, CAU-
TION, and INFORMATION labels attached to, or shipped
with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections
and on unit base. Detecting oil generally indicates a
refrigerant leak. Leak-test all refrigerant tubing con-
nections using electronic leak detector, halide torch,
or liquid-soap solution. If refrigerant leak is de-
tected, see Refrigerant Leaks section on page 15.
c. Inspect all field- and factory-wiring connections. Be
sure that connections are completed and tight.
d. Inspect coil fins. If damaged during shipping and han-
dling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that outdoor-fan blades are correctly
positioned in fan orifices. Blades should clear fan mo-
tor and fan orifice ring.
b. Make sure that air filters are in place.
c. Make sure that the condensate trap is filled with
water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
5. Loosen the compressor holddown bolts until sideways
movement of the washer under each holddown bolt can
be obtained. Do not loosen completely as bolts are self-
locking and will maintain adjustment.
6. Each unit has 3 Schrader-type gage ports per refrigera-
tion circuit: one on the suction line, one on the liquid
line, and one on the compressor discharge line. Be sure
that caps on the ports are tight.
Unit is now ready for initial start-up.
START-UP
I. HEATING SECTION START-UP AND ADJUSTMENTS
CAUTION: Complete the required procedures given
in the Pre-Start-Up section on this page and the Start-Up
Checklist on page CL-1 before starting unit.
Do not jumper any safety devices when operating the unit.
A. Checking Heating Control Operation
Start and check the unit for proper heating control operation
as follows:
1. Turn on unit electrical supply.
2. Set system switch selector at HEAT position and fan switch
at AUTO. or ON position. Set heating temperature above
room temperature.
3. The indoor fan and first-stage heat will start immedi-
ately. If unit is equipped with accessory electric heat,
second-stage heat will energize upon a call from W2. Check
for heating effect at supply diffusers.
4. The indoor fan and heater will cycle off with no delay
after thermostat temperature is satisfied.
To shut off unit, set system selector switch at OFF position
or set heating selector lever below room temperature.
B. Heating Sequence of Operation
Units Without Economizer
With unit main power on, set thermostat at HEAT position
and desired room temperature. Set fan switch at AUTO. (on
demand) or ON (continuous) position.
O
R
Y
T1
C
C
T2
CTD
LOGIC
90
50
30
DFT
TEST
OF1
DEFROST BOARD
DR
OF2
O
W2
R
Y
C
DEFROST
CYCLE TIME
ADJUSTMENT
WIRE
Fig. 22 — Defrost Board Timer Wiring
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