45
Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
10-20. Freeze protection thermostat
Part#
ͻഩϯϭϵϭϰϯͲϰϵϲ;<ϭϴϰͿ͗/ŶĚŽŽƌ
ͻഩϯϭϵϭϰϯͲϰϵϳ;<ϭϴϱͿ͗KƵƚĚŽŽƌ
Unit Part#
#713
Function
Temperature detecting device which prevents the pipes within the water
ŚĞĂƚĞƌĨƌŽŵĨƌĞĞnjŝŶŐ͘tŚĞŶƚŚŝƐĚĞǀŝĐĞĚĞƚĞĐƚƐƚĞŵƉĞƌĂƚƵƌĞƐďĞůŽǁϯϲ͘ϱȗ&
;Ϯ͘ϱȗͿŝŶƐŝĚĞƚŚĞǁĂƚĞƌƌŚĞĂƚĞƌ͕ƉŽǁĞƌŝƐƐƵƉƉůŝĞĚƚŽƚŚĞĞůĞĐƚƌŝĐŚĞĂƚĞƌƐ
ƚŽƉƌĞǀĞŶƚƚŚĞǁĂƚĞƌŚĞĂƚĞƌĨƌŽŵĨƌĞĞnjŝŶŐ͘
Failure events
ϭ͘KEͲĨĂŝůƵƌĞ;ůǁĂLJƐƐĞŶƐĞƐĨƌĞĞnjŝŶŐƚĞŵƉĞƌĂƚƵƌĞƐ͕ƌĞŐĂƌĚůĞƐƐŽĨĂĐƚƵĂů
temperature).
Ϯ͘K&&ͲĨĂŝůƵƌĞ;EĞǀĞƌƐĞŶƐĞƐĨƌĞĞnjŝŶŐƚĞŵƉĞƌĂƚƵƌĞƐͿ͘
Effects on the water heater
if freeze protection
thermostat fails
ϭ͘dŚĞĨƌĞĞnjĞƉƌŽƚĞĐƚŝŽŶŚĞĂƚĞƌƐǁŝůůĂůǁĂLJƐďĞKE͕ĐĂƵƐŝŶŐŚĞĂƚĚĂŵĂŐĞƚŽ
components inside the water heater.
Ϯ͘dŚĞĨƌĞĞnjĞƉƌŽƚĞĐƚŝŽŶŚĞĂƚĞƌƐǁŝůůŶĞǀĞƌďĞĂďůĞƚŽƚƵƌŶŽŶ͕ĞǀĞŶƵŶĚĞƌ
ĨƌĞĞnjŝŶŐƚĞŵƉĞƌĂƚƵƌĞƐ͕ĐĂƵƐŝŶŐĨƌĞĞnjĞĚĂŵĂŐĞƚŽƚŚĞǁĂƚĞƌŚĞĂƚĞƌ͘
Error codes when
the freeze protection
thermostat fails
N/A
Diagnostic
ϭ͘sŝƐƵĂůŝŶƐƉĞĐƚŝŽŶ͗ĐŽŶŶĞĐƚŝŽŶͬďƌĞĂŬĂŐĞŽĨǁŝƌĞƐĂŶĚͬŽƌƚŚĞďŽĚLJŚĂƐ
been broken.
Ϯ͘ŚĞĐŬƌĞƐŝƐƚĂŶĐĞĂŶĚǀŽůƚĂŐĞ͗ƉƌŽƉĞƌƌĂŶŐĞŽĨǀĂůƵĞƐƐŚŽǁŶďĞůŽǁ͘
Color / Number of wires
Black - Black
;ŝƚƐĞůĨͿ
ON mode: 108 VAC - 132 VAC
ĂŶĚůĞƐƐƚŚĂŶϭɏ
OFF mode: less than 1 VAC
ĂŶĚŵŽƌĞƚŚĂŶϭDɏ
Checkpoint
B1
Activation and deactivation temperature of the water heater’s freeze protection system
KEŵŽĚĞ͗ϯϲ͘ϱȗ&;нϲ͘ϯȗ&ͲϮ͘ϳȗ&ͿϮ͘ϱȗ;нϯ͘ϱȗͲϭ͘ϬȗͿ
K&&ŵŽĚĞ͗ĂďŽǀĞϰϲ͘ϰȗ&ĂďŽǀĞϴȗ
7/8" (22.2 mm)
1-3/8"
(33.
5
m
m)
1/4 " (5.7 mm)
