Schwank SPW2-JZ Series Installation & Owner's Manual page 41

18-A. WIRING DIAGRAM - MULTIPLE 2-STAGE HEATERS PER 2-STAGE THERMOSTAT
(FOR SINGLE HEATER PER THERMOSTAT SEE PREVIOUS PAGE)
(previous page)
NOTE: Total Relays Required


Example:
Quantity 4 two-stage heaters
requires: 2 + (4 x 2) = 10 Relays
Two-Stage Thermostat
MUST sequence
OFF -ON -ON (Off-Low-High)
41
Thermostat: 2 Relays
Each Heater: 2 Relays
SPW2, STW2(S) / IWP2, IW2(S) I&O Manual
RD: APR 2019
IM170629
RL: 03C