Weil-McLain SVF 1500 Manual page 58

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Field wiring
A. 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. SVF 1500/2000 Connect properly sized
voltage terminal strip as shown at right.
3. SVF 2500/3000 Connect properly sized
voltage terminal strip as shown in Three Phase Wiring schematic, Figure 56, page 55.
4. If possible, provide a surge suppressor in the supply power line. This will reduce the
possibilities of control damage due to line surges.
5. Must wire ground to this terminal to provide boiler grounding.
SVF 1500/2000 — 23.17 amps;
SVF 2500/3000 — 16.22 amps on L1;
When all three (3) circulators outputs
are used at 2.2 amps each.
B. 120 VAC Outputs 1, 2 & 3 – On each boiler –
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 120VAC 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 77 and page 78 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.
lowable current for each powered circulator
output is 2.2 amps at 120VAC
58
(see Figure 51 - Figure 58)
REQUIRED
120VAC
power wiring to SVF
208VAC
power wiring to SVF
Single Phase
120VAC
Three Phase
6.90 amps on L2; 208VAC 3-
6.90 amps on L3; Wye- Transformer w/Neutral
:
—
.
(continued)
Single Phase
TM
boiler line
TM
boiler line
Three Phase
Phase
As needed for systems
-
For circulators with higher amp ratings, install a circulator relay
or starter. Connect only the 120VAC coil to the SVF
terminals.
See Figure 51, page 50 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 exam-
ple above for 24 VAC zone valves.
TM
Part number 550-100-250/0819
circulator