radiant heating systems three-zone multi-pump relay

radiant heating systems three-zone multi-pump relay
Multi-PumpRelay_IS_7-07
7/3/07
3:18 PM
Page 1
RADIANT HEATING SYSTEMS
THREE-ZONE
MULTI-PUMP RELAY
INSTRUCTION SHEET
Cold Start Boiler Operation
When the thermostat calls for heat,
the appropriate circulator is energized
and the isolated end switch (X1 and
X2) will start the boiler.
Cold Start Boiler Application
24 VAC
Power
Thermostats
A3080301
Zone 1 Zone 2 Zone 3
1A
Jumper Placement
The jumper should be placed
between terminals ZC and H.
Connect the isolated end switch, X1
and X2 to the boiler aquastat control.
(For zone 1 priority, remove jumper
between terminals P and ZC.)
Two/Three-Zone Switching Relay
with Optional Priority
5A
N
P ZC H
X2
X1 ZR
Zone 1 Zone 2 Zone 3
Jumpers*
Spare Spare
Fuse Fuse
Power Input
Connect 120 VAC power input to
terminals N and H, neutral wire to
terminal N and hot wire to terminal H.
5A
5A
Power
Zone 1
Zone 2
Zone 3
* For zone 1 priority
remove jumper between
P and ZC terminals.
To: 120 VAC Power (Neutral)
To: 120 VAC Power (Hot)
120 Volt Circulators
To: "TT" on aquastat control
To: "TT" on aquastat control
Tankless Coil Boiler Operation
When any thermostat calls for heat,
the boiler is given a signal to start.
The appropriate circulator is energized
only when the boiler temperature is
above the set low limit.
Tankless Coil Boiler Application
(Alternative Wiring)
24 VAC
Power
A3080301
Zone 1 Zone 2 Zone 3
1A
Two/Three-Zone Switching Relay
with Optional Priority
Jumper Placement
The jumper should be placed
Z
between terminals ZC and X1.
Connect terminal ZC to ZC terminal
on the aquastat control. Connect
terminal ZR to ZR terminal on the
aquastat control. Confirm polarity is
consistent between boiler aquastat
and switching relay. (For zone 1
priority, remove jumper between
terminals P and ZC.)
5A
N P
ZC
Connect 120 VAC power input to
terminals N and H, neutral wire to
terminal N and hot wire to terminal H.
H
X2
X 1 ZR
5A
5A
Power
Zone 1
Zone 2
Zone 3
Zone 1 Zone 2 Zone 3
Jumpers*
Spare Spare
Fuse Fuse
To: 120 VAC Power (Neutral)
* For zone 1 priority
remove jumper between
P and ZC terminals.
To: 120 VAC Power (Hot)
To: "ZC" on aquastat control
To: "ZR" on aquastat control
Power Input
Thermostats
120 Volt Circulators
Multi-PumpRelay_IS_7-07
7/3/07
3:18 PM
Page 2
External Diagnostics
Features
Externally visible lights show full
functionality of the switching relay.
The green light should always be on,
indicating that power is connected.
When the thermostat calls for heat,
both the appropriate circulator and
red indicating light are energized.
• External indicator lights
• Priority
• Simplified wiring
• Fully enclosed snap-out relays
• Compact design
• Fuse-protected outputs
• 100% factory tested
• Isolated end switch
• Contractor-friendly PC board layout
• Universal thermostat
• Compatibility
• UL approved
• 24 volt power input or output
terminal
• Extended three-year warranty
• Made in the United States
Warning: Wiring connections
must be made in accordance
with all applicable electrical
codes. Use copper wire only with a
minimum temperature rating of 60/75°C.
Failure to follow this instruction can result
in personal injury or death and/or
property damage. 12-18 gauge wire
recommended for 120 VAC connections,
14-22 gauge wire for thermostat
connections and 14-22 gauge wire for
24 VAC source connections.
Specifications
Product
Number
Number of
Zones
Transformer
Voltage
Maximum
Combined Load
A3080301
3 with Priority
120 VAC Input
15 amps
Dimensions of Enclosure
Width Height Depth
10 1⁄4"
6 3⁄4"
2 3⁄4"
All switching relays are relay type DPST, have a thermostat current of 0.18 and have a single-phase
motor rating per zone of 1⁄3 hp (5.0A) at 120 VAC.
Aquastat
on DHW
Heater
A
T
T
Zone 1
Zone 2
Zone 3
Master
SR 503
Priority On
via Jumper
Placement
24 VAC
Power
Three-Zone Switching Relay
with Optional Priority
1A
In this example, the SR502/503 switching relay
is controlling another SR502/503 switching relay.
5A
5A
N
P
ZC
H
5A
X2
X 1 ZR
Zone 1
Zone 2
Power
Zone 1
Zone 2
Zone 3
Zone 3
Jumper
Spare Spare
Fuse Fuse
N
120 VAC Power
120 VOLT Circulators
H
T
T
T
Zone 1
Zone 2
Zone 3
Priority Off
via Jumper
Placement
Slave
DHW
Heater
Circulator
SR 503
24 VAC
Power
Three-Zone Switching Relay
with Optional Priority
Multi-PumpRelay_IS_7-07, Copyright © 2007 Uponor, Printed in the United States
1A
5A
5A
N
P
ZC
H
5A
X2
X1 ZR
Zone 1
Zone 2
Power
Zone 1
Zone 2
Zone 3
Zone 3
Jumper
Spare Spare
Fuse Fuse
Boiler
120 VOLT Circulators
To: "TT" on aquastat control
Uponor, Inc.
5925 148th Street West
Apple Valley, MN 55124
USA
Tel: (800) 321-4739
Fax: (952) 891-1409
Web: www.uponor-usa.com
E-mail: learnmore@uponor-usa.com
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