Thermostat Wiring - Tekmar 521 Installation & Operation Manual

Temperature vs. Resistance Table - Continued
Temperature
°F °C
100 38
105 41
110 43
115 46
120 49
125 52
130 54
135 57
140 60
145 63
150 66
155 68
160 71

Thermostat Wiring

- --- - ---- - - ----- - - - - ---- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --- - ---- - - ----- - - - - ---- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Zone Valve
T
Boiler
A Watts Water Technologies Company
Resistance
5,828
5,210
4,665
4,184
3,760
3,383
3,050
2,754
2,490
2,255
2,045
1,857
1,689
T
Zone
Valve
R C
L N
Transformer
Temperature
°F
165
170
175
180
185
190
195
200
205
210
215
220
225
Field Jumper Required:
R to Rh
C R Rh W1 Y/W2 Rc G G
Com
9 of 28
Resistance
°C
74
77
79
82
85
88
91
93
96
99
102
104
107
No Power
S1 S2
© 2020
1,538
1,403
1,281
1,172
1,073
983
903
829
763
703
648
598
553
521_D - 12/20