Page 3
13HPD SERIES
OUTDOOR
COIL
CHECK
EXPANSION VALVE
BI−FLOW
FILTER /
DRIER
TO
HCFC−22
DRUM
LOW
PRESSURE
COMPRESSOR
REVERSING VALVE
VAPOR LINE
VALVE
MUFFLER
NOTE − Arrow indicate direction
of refrigerant flow.
CHECK EXPANSION VALVE OR
FIXED ORIFICE DEVICE
INDOOR UNIT
OUTDOOR UNIT
LIQUID
SERVICE
PORT
GAUGE MANIFOLD
DISTRIBUTOR
INDOOR
COIL
VAPOR
SERVICE
PORT
HIGH
PRESSURE
LIQUID
LINE
VALVE
Figure 1. Typical Manifold Gauge Connection Setup
IMPORTANT
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.
1
2
3
4
5
6
7
8
9
10
11
12
1/6 TURN
This illustrates how to use an appropriately sized wrench to tighten
caps an additional 1/6 or 1/12 turn clockwise.
1
2
3
4
5
6
7
8
9
10
11
12
1/12 TURN
Figure 2. Cap Tightening Distances
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and
fitted snugly over the cap before tightening.
Operating Angle−Type Service Valve
To Access Angle−Type Service Port:
A service port cap protects the service port core from
contamination and serves as the primary leak seal.
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
STEM CAP
VALVE STEM
FRONT-SEATED
TO OUTDOOR UNIT
SERVICE PORT
CORE
TO INDOOR
UNIT
SERVICE PORT
SERVICE PORT CAP
CLOSED TO BOTH
INDOOR AND
OUTDOOR UNITS]
Figure 3.
Angle−Type Service Valve
(Valve Font−Seated Closed)
1. Remove service port cap with an appropriately sized
wrench.
2. Connect gauge to the service port.
3. When testing is completed, replace service port cap and
tighten as follows:
With Torque Wrench
: Finger tighten and then
tighten per table 1.
Without Torque Wrench
: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 2.
To Open and Close Angle−Type Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak−free seal.
1. Remove stem cap with an appropriately sized wrench.
2. Use a service wrench with a hex−head extension
(3/16" for liquid-line valve sizes and 5/16" for
vapor-line valve sizes) to back the stem out
counterclockwise as far as it will go.
