Master/relay cheat sheet
10
Revised 4.6.2007
James Putland
Warmup, Inc
Master/Relay Cheat Sheet:
Disclaimer:
This sheet does not preclude or eliminate the need to read either the “Warmup Undertile Heater Installation Manual” or the installation
instructions provided with the thermostats. This represents a breakdown of the material contained in the Master and Relay installation
instructions, but is not a replacement for those directions. If you have any questions regarding the product or installation, please call
(888) 927-6333, and one of our customer service representatives will be happy to assist you.
1. Each Slave (Relay) connects to 1-2 heaters
a. Heaters are connected via the outside wires marked load (one black, one white) on the
back of each Slave (Relay).
b. The other two wires are marked 120VAC (one black, one white) and are
connected to the dedicated circuit of 16 amps provided for
each individual slave.
c. Connect Ground (green/bare) to line from home.
2. To connect Slaves (Relays)/Master Thermostat:
a. This process requires using the terminals inside the Slaves (Relays) that are found by
removing the face of each unit.
b. A sticker sits above this terminal labeled 1-4
i. 1 and 4 are labeled “GND” for ground
ii. 2 is labeled “Drive”
iii. 3 is labeled “+12V”
c. The Wiring
i. braided 18-22 gauge wire is required (to be supplied by a certified electrician)
ii. Wiring is a “daisy chain,” requiring you to wire Slave (Relay) to Slave (Relay)
to Slave (Relay)…. etc.
1. Wire “GND” 1 to “GND” 1
2. Wire “Drive” to “Drive”
3. Do not wire the second “GND” connection (marked under #4) - it will
not be used. Also, do not use the “12VDC” connection as this will be
used in the final wiring.
4. Steps 1-3 apply to all Slave (Relay) connections.
5. Final Slave hookup to Master Thermostat
a. The final slave that connects directly to the Master Thermostat is
wired the same as in Step 2. In addition, the connection marked
“12VDC” must also be wired to the Master Thermostat (refer to
diagram).
i. This last connection is what provides power to the
programmable Master Thermostat.
ii. This requires no additional circuit or connections.
b. The bottom two connections that are marked with a symbol (a
circle surrounds a jagged line, refer to diagram) is connected to
the floor probe
i. Floor probe must be at least 12 inches into the floor
ii. Must have at least a 1-inch clearance on either side from
heater wires.