Field controls TSP-1 User Manual

THERMAL SAFETY SWITCH

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Model: TSP-1

Installation of a Thermal Safety Switch or Spillage Switch is
recommended for L.P. and Natural Gas fired systems with draft hoods.
This device is installed to detect flue gas spillage from a blocked flue
system and/or inadequate draft. This device MUST be installed by a
qualified installer in accordance with manufacturer’s installation
instructions. Wiring should be in accordance with the manufacturer’s
recommendations, National Electrical Code and applicable local codes.

NOTE: For 30 Millivolt Wiring Applications, the TCA-1 Thermocouple
Adapter must be ordered sparately. (Part No. 46082700)

TEMS SUPPLIED WITH KIT

1 Thermal Safety Switch Assembly
3 Probe Mounting Tabs
5 #8 Self-tapping Sheet Metal Screws

INSTALLATION
CAUTION: Never attempt to shorten probe length. Avoid kinking

probe while handling. Before and after installation, it is
recommended to follow the pre-installation inspection
instructions.

NOTE: Probe length is designed for mounting on draft hoods up
to 6” Dia. Pipe size. To achieve 360° spillage sensing on larger
draft hood, an additional switch or switches would be required.

WATER HEATERS AND BOILERS

1. Mount the switch box onto the appliance 2 to 3 inches away
from the draft hood using two sheet metal screws. The probe
should be directed towards the draft hood. (See Figure 1)

An alternative mounting method is to mount the switch
directly onto the draft hood. (See Figure 2)

2. Mount the probe tabs around the draft hood, located
approximately 120° apart. The bottom of the bent end should be ½ to ¾ inches
away from the bottom edge of the draft hood. (See Figure 3)

3. Carefully uncoil and route the probe around the draft hood. (See Figure 3) Avoid
bending the sensing probe, kinks can alter the switches performance. NOTE: For

small draft hoods, multiple wraps around the draft hood is required.

4. To secure the probe, bend the tab ends to hold the probe secure.

FURNACES OR UNIT HEATERS

1. Mount the switch on the outside of the appliance near the draft hood. The probe
should be directed towards the draft hood.

2. Mount the probe tabs along the top edge of the draft hood. (See Figure 4) The
bottom of the bent end should be ½ to ¾ inches away from the edge of the draft
hood.

3. Carefully uncoil and route the probe along the draft hood. (See
Figure 4) Avoid bending the sensing probe, kinks can alter the
switches performance. NOTE: For small draft hoods, double back

with the probe using a minimum of a 1 inch radius to bend the
probe. (See Figure 4)

4. To secure the probe, bend the tab ends to hold the probe secure.

Figure 1

Figure 2

Figure 3

Figure 4

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