Taco SR 502-4 switching relay output

[ktm010]

Can a SR502 switching relay be used to power a Safgard mod 1100 LWCO calls for power consumption 1VA , switching capacity 50VA, Max load 5 amps

 

[ewdudley]

SR502 sheet calls out supply of one ampere per end switch, so 24 VA each. If your thermostat [edit:] loads all draw less than one ampere (555 bee hive draws 0.9 ampere maximum, for instance), then you should have plenty of leftover transformer output capacity to supply one measly VA.

 

[ktm010]

I'am using two Tekmar 518 themostats in the room

 

[ewdudley]

I'am using two Tekmar 518 themostats in the room

Sorry, meant to say amperage of loads controlled by the thermostats, the zone valves presumably.

 

[ktm010]

Both circs are grundfos 15-58's

 

[PassionForFire&Water]

Both circs are grundfos 15-58's

(broken link removed)
Specifications:
PRODUCT NUMBER INPUT MAXIMUM TYPE 1 ENCLOSURE
NUMBER OF ZONES VOLTAGE COMBINED LOAD WIDTH HEIGHT DEPTH
SR502-4 2 with Priority 120/60/1 VAC 15 amps 103/4" 7" 23/4"
All circulator relay connections, including ZC/ZR, are rated 1/3 hp (6 FLA, 36 LRA) at 120 VAC.
End switch connections are rated 24 VAC, 1 amp.
All thermostat connections supply a 24 VAC class 2 output.


(broken link removed to http://www.taco-hvac.com/uploads/FileLibrary/SR502(102-082).pdf)
Specifications:
PRODUCT NUMBER TRANSFORMER MAXIMUM DIMENSIONS OF ENCLOSURE
NUMBER OF ZONES VOLTAGE COMBINED LOAD WIDTH HEIGHT DEPTH
SR502 2 with Priority 120 VAC Input 15 amps 10 1/4" 6 3/4" 2 3/4"
All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase
motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.