Operating instructions

14
Figure 20: Thermostat Isolation Relay Attachment
iii. Align center and mounting holes of Junction
Box with upper front corner of jacket left side
panel.
iv. Install Junction Box to jacket from inside
vestibule area with two (2) blunt sheet metal
screws provided.
b. Mount transformer on Junction Box. For
Canadian boiler provide strain relief by loosely
securing Transformer to Junction Box with wire
tie inserted through Transformer plate and a
Junction Box mounting hole. See Figure 19.
Figure 19: Junction Box and Transformer
Assembly
e. Water with tankless heater only (EZWT and
WCT). Secure R8225D relay to Junction Box.
See Figure 1.
4. Water Boiler
a. Install Temperature/Pressure Gauge into upper
Tapping "C" (½ NPT bushed to ¼ NPT). See
Figure 1 and 2. Tighten by wrench applied to
square shank on back of gauge. DO NOT APPLY
PRESSURE ON GAUGE CASE since this may
destroy calibration of gauge.
b. Install hot water temperature limit and/or
combination control. Remove well from control.
Screw well into Tapping "H" (¾ NPT). See
Figure 1 and 2. Install bulb in well as far as
possible, then tighten set screw.
c. On boilers equipped with a circulator without
tankless heater in areas where condensation of
flue gases is encountered in boiler flueways, a
reverse-acting circulator control should be
installed in supply as close as possible to boiler
in order to avoild condensation.
E. Continue to Section IV: Packaged Boiler Assembly,
Paragraph E.
c. Fork connector on yellow and blue (HSP only)
wire(s) of gas valve harness must be removed
and wire stripped before making wire
connections. Refer to Section VIII for wiring.
d. Steam Boilers only. Secure the R8222 Thermostat
Isolation Relay to upper left corner of jacket
vestibule panel with sheet metal screws provided.
See Figure 20.