Weil-McLain PLUS LINE PLUS-E017-A/1206 - Manual (Page 31)

Part Number PLUS-E017-A/1206 1
Manual
• Installation • Start-Up • Usage • Maintenance • Parts
Wiring a system circulator
1. For combined systems, to activate a system circu-
lator when the Boiler circulator operates, wire as
shown at bottom of Figure 1, page 0.
2. You must install a relay as shown. DO NOT wire in
parallel with the Boiler circulator. See CAUTION in
Figure 1.
Routing line voltage wiring
1. Route line voltage connections to the jacket open-
ings shown in Figure 18.
Low voltage connections
(Fig. 18)
1. Connect low voltage wiring to low voltage termi-
nal strip (Figure 19, page 2, item 1) as shown in
Figure 19 and the boiler wiring diagram.
2. Route all low voltage wires through grommeted
jacket opening to right of low voltage terminal strip,
as shown in Figure 18.
Room thermostat
(space heating)
1. For combined space heating/water heating systems,
connect Figure 19, item 2, room thermostat or end
switch (isolated contact only) between terminals 
and .
2. Install thermostat on inside wall away from influ-
ences of drafts, hot or cold water pipes, lighting
fixtures, television, sunrays, or fireplaces.
. Thermostat anticipator (if applicable):
a. If connected directly to boiler, set for 0.1 amps.
b. If connected to relays or other devices, set to match
total electrical power requirements of connected
devices. See device manufacturers’ specifications and
thermostat instructions for details.
Outdoor temperature sensor
1. Outdoor reset operation applies only to combined
space heating/water heating systems.
2. Connect outdoor temperature sensor (Figure 19,
item ) between terminals 1 and 2 to enable out-
door reset operation of the Gasboiler. If
fixed-temperature operation is required, do not
install outdoor sensor.
. Mount sensor on exterior wall, shielded from di-
rect sunlight or flow of heat or cooling from other
sources.
. Install a summer/winter switch (Figure 19, item )
across terminals 1 and 2 to force fixed-temperature
operation during summer months. (When the
switch is closed, boiler will attempt to maintain
constant temperature.)
. Route sensor wires through the grommeted hole at
right of the electrical entrance (see Figure 18).
Water heater thermostat
1. Connect PLUS water heater aquastat terminals
“C” and “1” to Gas boiler low voltage ter-
minal strip between terminals  and  (Figure 9,
item ).
Additional limits
1. Connect additional limit controls and interlocks
between the terminals shown in Figure 19.
2. Controls connected between terminals  and 
(see Figure 19, item ) will cause a soft lockout
(automatic reset). When limit(s) closes, boiler will
resume normal operation.
. Controls connected between terminals  and 8
(see Figure 19, item ). will cause a hard lockout
(manual reset). The boiler will only restart after
the Ultra display panel RESET switch is pressed.
Figure 18 Routing field wiring
Field wiring — Gas boilers only
(continued)
B3
Gas