Accessory List

WA300
F-27382-1 © Copyright 2006 TAC. All Rights Reserved. 313
TAC Erie™ Two Zone Hydro-Air Relay
Model Chart
Accessories
Specifications
The WA300 hydro-air control relay incorporates
double pole/single throw relays to provide control
for up to two hydro-air systems including two air
handlers/AC controller, two system heating
circulators, one boiler/burner circulator, and one
domestic hot water controller. Domestic hot water
priority zone eliminates the need for additional
relays to provide domestic hot water for indirect
fired hot water tanks. The thermostats used with
the WA300 must power the fan on when the heat
output is powered.
Features:
• Capable of controlling two hydro-air systems in one relay
package.
• Selectable fan delay of 90 to 180 seconds in heat mode.
• Common 24 Vac transformer terminal provides
compatibility with electronic thermostats.
• Field replaceable circulator relays.
• Large terminal connections.
• Expandable up to 4 zones with the addition of a second
WA300.
Model No. Description
WA300 Refer to Specifications.
Model No. Description
EXP10 Replacement plug in relay.
Inputs
Power input
Circulators: 120 Vac @ 50/60 Hz.
Fan centers: 24 Vac @ 50/60 Hz.
Connections See Figure 1 - Typical Wiring.
Outputs
Electrical
Thermostatic anticipator setting: Set to actual current draw of system @ 24 Vac.
Circulator relay rating: Full load: 7.2 amps; Locked rotor: 43.2 amps; Resistive: 7.4 amps.
Fan center switch rating: 1 amp @ 24 Vac.
Environment
Ambient temperature limits Operating: 120°F (49°C) maximum.
Humidity 5 to 95% RH, non-condensing.
Locations NEMA Type 1.
Dimensions 5-1/8 H x 12-5/16 W x 2-15/16 D inches (130 x 312 x 75 mm).
General Instructions Refer to F-27021.
300