tekmar 521 Programmable Thermostat Installation - Manual (Page 9)

© 2014 521_D - 01/14
9 of 28 A Watts Water Technologies Company
Temperature vs. Resistance Table - Continued
Temperature Resistance
°F °C
100 38 5,828
105 41 5,210
110 43 4,665
115 46 4,184
120 49 3,760
125 52 3,383
130 54 3,050
135 57 2,754
140 60 2,490
145 63 2,255
150 66 2,045
155 68 1,857
160 71 1,689
Temperature Resistance
°F °C
165 74 1,538
170 77 1,403
175 79 1,281
180 82 1,172
185 85 1,073
190 88 983
195 91 903
200 93 829
205 96 763
210 99 703
215 102 648
220 104 598
225 107 553
Thermostat Wiring
Zone Valve --------------------------------------------------------- ---------------------------------------------------------
C
N L
R
C R Y/W2 Rc G G Rh W1 S1 S2 Com
No Power
T T
Zone
Valve
Boiler
Transformer
Field Jumper Required:
R to Rh