Torque Requirements; Typical Unit Parts Arrangement; Operating Gauge Set And Service Valves - Ducane 13HPD-018-230 Instructions Manual

Typical Unit Parts Arrangement

CONTROL BOX
CAPACITOR
DEFROST CONTROL
GROUND LUG
SINGLE POLE
CONTACTOR (K−1)

Torque Requirements

When servicing or repairing heating, ventilating and air
conditioning components, ensure the fasteners are
appropriately tightened. Table 1 lists torque values for
fasteners.
Table 1. Torque Requirements
Parts Recommended Torque
Service valve cap 8 ft.− lb.
Sheet metal screws 16 in.− lb.
Machine screws #10 28 in.− lb.
Compressor bolts 90 in.− lb.
Gauge port seal cap 8 ft.− lb.

Operating Gauge Set and Service Valves

USING MANIFOLD GAUGE SET
When checking the system charge, only use a manifold
gauge set that features low loss anti−blow back fittings.
OPERATING SERVICE VALVES
The liquid and vapor line service valves are used for
(C12)
(CMC1)
Figure 1. Typical Unit Parts Arrangement
11 NM
2 NM
3 NM
10 NM
11 NM
DEFROST
THERMOSTAT
(S6)
CHECK / EXPANSION
VALVE
LIQUID LINE BI−FLOW
FILTER DRIER
TRUE SUCTION PORT
REVERSING VALVE (L1)
HIGH PRESSURE SWITCH (S4)
(−018 UNIT ONLY)
LIQUID LINE
SERVICE PORT
removing refrigerant, flushing, leak testing, evacuating,
checking charge and charging.
Each valve is equipped with a service port which has a
factory−installed valve core. Figure 2 provides information
on accessing and operating both angle and ball service
valves.
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and fitted
snugly over the cap before tightening.
Only use Allen wrenches of sufficient hardness (50Rc −
Rockwell Harness Scale minimum). Fully insert the
wrench into the valve stem recess.
Service valve stems are factory−torqued (from 9 ft−lbs for
small valves, to 25 ft−lbs for large valves) to prevent
refrigerant loss during shipping and handling. Using an
Allen wrench rated at less than 50Rc risks rounding or
breaking off the wrench, or stripping the valve stem
recess.
Page 3
MUFFLER
CRANKCASE HEATER
(HR1) (−042, −048, −60
UNITS ONLY)
VAPOR LINE SERVICE
PORT
IMPORTANT
IMPORTANT
13HPD SERIES