Weil-McLain 2 Series Manual page 52

®
SlimFit Series 2
Field wiring
A. 120 VAC Power Supply –
1. Boiler line voltage power — Boiler loads are listed below. Provide and install a fused
disconnect or service switch as required by applicable codes.
2. Connect properly sized
strip as shown at right.
3. If possible, provide a surge suppressor in the supply power line. This will reduce the
possibilities of control damage due to line surges.
4. Must wire ground to this terminal to provide boiler grounding.
SF1000 — 12.1 amps;
SF1500 — 20.7 amps;
SF2000 — 23.2 amps
B.
1. Output 1: P2 Terminals 1 (H), 4 (N), 7 (G).
2. Output 2: P2 Terminals 2 (H), 5 (N), 8 (G).
3. Output 3: P2 Terminals 3 (H), 6 (N), 9 (G).
4. Maximum load: 2.2 amps (use relay if circulator load is higher). See WARNING
below.
5. Each boiler has three outputs (Output 1, Output 2, and Output 3) that provide
120 VAC to the following listed below.
A zone circulator.
A system circulator.
A DHW circulator (used to circulate through an indirect tank).
An auxiliary item that must be energized during an input call, such as an air
damper.
6. When using inputs/outputs for heat/DHW demands, each input (Input 1, Input 2,
and Input 3) controls its respective 120 VAC output (Output 1, Output 2, and
Output 3). Outputs are energized only when BOTH conditions below are met:
a. The corresponding input indicates a call for heat/DHW (i.e., contact closure).
b. The PRIORITY assigned to the Input/Output pair is ACTIVE (i.e., the zone
may be calling but the pump won't activate unless the boiler is currently run-
ning on that system/priority).
7. When using the inputs/outputs for the AUX PUMP/OUTPUT function, the
output is controlled by selectable conditions set up in the control.
a. Use the AUX PUMP/OUTPUT function for devices such as system pumps,
combustion air dampers, and other auxiliary equipment to activate when the
boiler is on/running.
b. See page 71 and page 72 for more information on the setup and selection of
operating conditions.
The DHW aquastat can be connected to any one of the three input/
output pairs. The selected input should be assigned to PRIORITY 1
during the WIZARD setup or manually in the ASSIGN INPUTS menu.
.
52
COMMERCIAL CONDENSING GAS
(see
REQUIRED
power wiring to SlimFit boiler line voltage terminal
– On each boiler –
:
—
- — Boiler Manual
FIRED WATER BOILER
(continued)
As needed for systems
For circulators with higher amp ratings, install a circulator relay or
-
starter. Connect only the 120 VAC coil to the
terminals.
See Figure 52, page 48 for details
See Figure 52, page 48 for details
Output circuits are 120 VAC. If an
output is to operate a low voltage cir-
cuit or must be an isolated contact,
use an isolation relay. See example
above for 24 VAC zone valves.
SlimFit
Part number 550-100-180/0917
circulator