Weil-McLain SVF 1500 Manual page 60

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Field wiring
E.
1. Two (2) immersion temperature sensors are shipped with each boiler. Install
one to the system supply piping and the other to the system return piping.
TM
See SVF
boiler manual replacement parts section for available replacement
immersion sensors or strap on sensors.
2. Locate the supply sensor at least six pipe diameters, but no further than 3 feet,
downstream from the boiler connection to the main to ensure adequate mixing.
3. Supply sensor – wire between P14 #1 and #2 (common).
4. Return sensor – wire between P14 #3 and #2 (common).
5. Thermostat wire can be used to connect these sensors.
6. The Control compares the system return temperature with the system supply
temperature. Should the return temperature ever exceed the supply temperature,
the Control knows there is likely a sensor failure and will report this problem on
the display.
All heating systems shown in this manual require the System Supply and
Return sensors to be installed for proper control function. System will
not properly provide heat if sensors are not installed according to these
instructions.
F. Outdoor temperature sensor –
1. The control provides programmable options if using an outdoor temperature
sensor. This sensor is supplied with the boiler.
2. Mount the outdoor sensor on an exterior wall, shielded from direct sunlight or
flow of heat or cooling from other sources.
3. The wire outlet on the sensor must be oriented DOWN to prevent water entry.
4. Connect the sensor leads to the terminal shown at right and in the wiring diagrams
(see Figure 51, page 50). Thermostat wire can be used to connect the sensor.
60
(see Figure 28 - Figure 58)
OPTIONAL
(continued)
–
REQUIRED
1/2" NPT -4" long Immersion sensors standard.
Optional strap on sensors available in Replacement
Part section.
See Figure 51, page 50 for details.
See Figure 51, page 50 for details.
Part number 550-100-250/0819