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SlimFit
Series 2
®
Field wiring
(see Figure 52 & Figure 53)
A. 120 VAC Power Supply –
Terminal Block P1
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 120 VAC power wiring to SlimFit boiler line voltage
terminal 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 120 VAC Outputs 1, 2 & 3 – On each boiler –
Terminal Strip P2
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 WARN-
ING 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, Out-
put 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., con-
tact 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 running 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.
For Priority DHW Application:
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.
CIRCULATOR POWER —
able current for each circulator is 2 2 amps
at 120 VAC
.
52
commercial condensing gas
REQUIRED
The maximum allow-
— Boiler Manual
-
fired water boiler
(continued)
See Figure 52, page 48 for details
As needed for systems
See Figure 52, page 48 for details
For circulators with higher amp ratings, install a circulator relay
or starter. Connect only the 120 VAC coil to the
lator terminals.
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 550-100-561/0224
circu-
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