Service manual

SECTION 5: PUMP INSTALLATION
11
5.3.2 Attaching Pressure Switch to Pump Inlet
Apply silicone sealant (600° F) to the threads of the
pressure switch and then screw the pressure switch
into the 1/8" NPT hole provided on the pump inlet.
See Page 9, Figure 3. Care must be taken to make
certain that the application of silicone does not plug
the orifice hole of the pressure switch. Without pump
verification, the system will not operate.
5.3.3 Pump Inlet Adapter for 4" (10 cm) Tubing
Apply a bead of silicone sealant (600° F) to the 6"
(15 cm) inside of the adapter (6" x 4") (15 cm x 10
cm). Mount the adapter to the inlet of the pump scroll
using the 3 - #10 self drilling screws provided. See
Page 11, Figure 7.
IMPORTANT: To prevent leakage of condensate, do
not install screws at the 6 o’clock position.
Mount the pump boot to the inlet adapter using the
band clamp provided. See Page 11, Figure 7.
5.3.4 Pump Inlet for 6" (15 cm) Tubing
Attach 6" (15 cm) pump boot to the inlet See Figure
8, then See Section 5.3.5.
FIGURE 7: Pump Inlet Side 4"
FIGURE 8: Pump Inlet Side 6"
5.3.5 Discharge Connection to 6" (15 cm) Flue
Mount the 6" (15 cm) pump boot to the pump outlet
using the 6" (15 cm) band clamp provided. See Page
11, Figure 9.
FIGURE 9: Pump Discharge Side
Band Clamp
4" (10 cm)
Pump Boot
4" (10 cm)
CONNECT
TO SYSTEM
TUBING
4" (10 cm)
Pressure Switch
Inlet
Assembly
4 x 6 Adapter
Description Part Number
Pressure Switch 90430600
Pump Boot 4" (10 cm) 91412800
Band Clamp 4" (10 cm) 91901300
Inlet Assembly 90713454
4x6 Adapter 02719903
Band Clamp
6" (15 cm)
Pump Boot
6" (15 cm)
CONNECT
TO SYSTEM
TUBING
6" (15 cm)
Pressure Switch
Inlet
Assembly
Description Part Number
Pressure Switch 90430600
Pump Boot 6" (15 cm) 91412802
Band Clamp 6" (15 cm) 91913703
Inlet Assembly 90713451
Band Clamp
6" (15 cm)
Pump Boot
6" (15 cm)
CONNECT
TO FLUE
6" (15 cm)
The minimum diameter outlet
allowed is 6" (15 cm). Further
reduction will reduce pump
performance.
Description Part Number
Pump Boot 6" (15 cm) 91412802
Band Clamp 6" (15 cm) 91913703