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29

SYSTEM PUMP

 = Runs when any 

zone calls for heat. 

SEC PUMP

 = Runs when any zone 

calls for heat. 

ZONE 1 PUMP

 = Runs when zone 1 

thermostat calls for heat and zone 1 
end switch has closed.  A jumper is 
required between the ZONE 1 END 
SWITCH terminals when using a pump 
for ZONE 1 instead of a zone valve.

STATUS DURING ZONE 1 DEMAND ON / OFF

 = When status jumper is 

placed on ON pins, the secondary and / or system pump will continue to 
operate during ZONE 1 demand. When jumper is placed on OFF pins, the 
corresponding pump will be OFF during ZONE 1 demand.

L

PUMP 2

N

PRIMARY

PUMP

L

PRIORITY

PUMP 1

N

L

POWER IN

N

GROUNDS

L

PUMP 3

N

TRANSFORMER

L

N

L

PUMP 4

N

L

PUMP 5

N

L

PUMP 6

N

POWER

ZONE1

ZONE2

ZONE3

ZONE4

ZONE5

ZONE6

T-STAT 2

C

R

W

T

T COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T COM

T-STAT 1

C

R

W

T

T COM

T-STAT 4

C

R

W

T

T COM

T-STAT 5

C

R

W

T

T COM

T-STAT 6

C

R

W

T

T COM

AUX

6 Zone

ZSR106

MASTER

PRIORITY ON

REMOTE ENABLE ON

EXERCISE ON

POST PURGE ZONE#1 ON

SLAVE

OFF

OFF

OFF

OFF

REMOTE ENABLE

24 - 120 VAC

L

N

O

N

O

F

F

STATUS 

DURING

PRIORITY

The ZVR series of controls is 
programmed by the dip switches 

 

which can be positioned for the 
following operations.

Master / Slave: 

allows for unlimited 

expansion to additional ZVR or ZSR 
relays.

Pump Exercise ON / OFF:

 When 

exercise mode is ON, each circulator 
is switched on for 30 seconds following 72 hours of inactivity.

Priority ON / OFF:

 When priority switch is ON, upon demand, Zone 1 will  

operate as priority and all other zones are temporarily switched off (with 1 hour 
time-out). When priority is  OFF, any zones that were active when Zone 1 was 
switched on will remain on.                          

AUX ON / OFF During Priority Demand: 

When AUX switch is ON, the AUX 

dry contacts will close during a priority demand. When switch is OFF, the AUX 
dry contacts will remain open during a priority demand.

6 Zone

ZVR106

L

POWER  I N

N

POWER

T-SAT
 CALL

ZONE 6

L

ZONE #1

PUMP

N

L

SEC

PUMP

N

STATUS DURING         
ZONE #1 DEMAND

ZONE 1

END

SWITCH

MOTOR

ZONE 2

END

SWITCH

MOTOR

ZONE 3

END

SWITCH

MOTOR

ZONE 4

END

SWITCH

MOTOR

ZONE 5

END

SWITCH

MOTOR

ZONE 6

END

SWITCH

MOTOR

L

SYSTEM

PUMP

N

T-STAT 2

C

R

W

T

T COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T COM

T-STAT 1

C

R

W

T

T COM

T-STAT 4

C

R

W

T

T COM

T-STAT 5

C

R

W

T

T COM

T-STAT 6

C

R

W

T

T COM

AUX

O

N

O

F

F

O

N

O

F

F

VALVE
 OPEN

ZONE 1

ZONE 2

ZONE 4

ZONE 5

ZONE 3

MASTER

PUMP EXERCISE ON

PRIORITY ON

AUX ON

SLAVE

OFF

OFF

OFF

DURING PRIORITY DEMAND

Maintenance and Repair

: The  Caleffi Z-one™ multi-zone valve relay comes 

with a automatic resettable fuse and requires no maintenance. If control fails or 
is damaged, replace control with functional one. 

R = 24 VAC.  
W = Heat call
C = Common of 24 VAC
Heat demand is initiated by closing R 
to W.
24 VAC is always present between R 
& C.  

Thermostat connections

L

PUMP 2

N

PRIMARY

PUMP

L

PRIORITY

PUMP 1

N

L

POWER IN

N

GROUNDS

L

PUMP 3

N

TRANSFORMER

L

N

L

PUMP 4

N

L

PUMP 5

N

L

PUMP 6

N

POWER

ZONE1

ZONE2

ZONE3

ZONE4

ZONE5

ZONE6

T-STAT 2

C

R

W

T

T COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T COM

T-STAT 1

C

R

W

T

T COM

T-STAT 4

C

R

W

T

T COM

T-STAT 5

C

R

W

T

T COM

T-STAT 6

C

R

W

T

T COM

AUX

6 Zone

ZSR106

MASTER

PRIORITY ON

REMOTE ENABLE ON

EXERCISE ON

POST PURGE ZONE#1 ON

SLAVE

OFF

OFF

OFF

OFF

REMOTE ENABLE

24 - 120 VAC

L

N

O

N

O

F

F

STATUS 

DURING

PRIORITY

L  = Line (hot leg) of 120 VAC supply
N = Neutral of 120 VAC
   = Grounds

Input power

Pump outputs

6 Zone

ZVR106

L

POWER  I N

N

POWER

T-SAT
 CALL

ZONE 6

L

ZONE #1

PUMP

N

L

SEC

PUMP

N

STATUS DURING         
ZONE #1 DEMAND

ZONE 1

END

SWITCH

MOTOR

ZONE 2

END

SWITCH

MOTOR

ZONE 3

END

SWITCH

MOTOR

ZONE 4

END

SWITCH

MOTOR

ZONE 5

END

SWITCH

MOTOR

ZONE 6

END

SWITCH

MOTOR

L

SYSTEM

PUMP

N

T-STAT 2

C

R

W

T

T COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T COM

T-STAT 1

C

R

W

T

T COM

T-STAT 4

C

R

W

T

T COM

T-STAT 5

C

R

W

T

T COM

T-STAT 6

C

R

W

T

T COM

AUX

O

N

O

F

F

O

N

O

F

F

VALVE
 OPEN

ZONE 1

ZONE 2

ZONE 4

ZONE 5

ZONE 3

MASTER

PUMP EXERCISE ON

PRIORITY ON

AUX ON

SLAVE

OFF

OFF

OFF

DURING PRIORITY DEMAND

6 Zone

ZVR106

L

POWER  I N

N

POWER

T-SAT
 CALL

ZONE 6

L

ZONE #1

PUMP

N

L

SEC

PUMP

N

STATUS DURING         
ZONE #1 DEMAND

ZONE 1

END

SWITCH

MOTOR

ZONE 2

END

SWITCH

MOTOR

ZONE 3

END

SWITCH

MOTOR

ZONE 4

END

SWITCH

MOTOR

ZONE 5

END

SWITCH

MOTOR

ZONE 6

END

SWITCH

MOTOR

L

SYSTEM

PUMP

N

T-STAT 2

C

R

W

T

T COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T COM

T-STAT 1

C

R

W

T

T COM

T-STAT 4

C

R

W

T

T COM

T-STAT 5

C

R

W

T

T COM

T-STAT 6

C

R

W

T

T COM

AUX

O

N

O

F

F

O

N

O

F

F

VALVE
 OPEN

ZONE 1

ZONE 2

ZONE 4

ZONE 5

ZONE 3

MASTER

PUMP EXERCISE ON

PRIORITY ON

AUX ON

SLAVE

OFF

OFF

OFF

DURING PRIORITY DEMAND

Motor = 24 VAC to power the zone 
valve motor
End Switch = Connects to end switch 
on zone valve.  Must be jumpered if 
using a 2 –wire zone valve.  

Zone valve connections

WARNING: 

NEVER CONNECT R & C DIRECTLY, this will be a direct short on the 24 

VAC supply.

WARNING: 

When connecting 2 or more Z-one controls, all controls must be powered 

by the same 120 VAC circuit.

L

PUMP 2

N

PRIMARY

PUMP

L

PRIORITY

PUMP 1

N

L

POWER IN

N

GROUNDS

L

PUMP 3

N

TRANSFORMER

L

N

L

PUMP 4

N

L

PUMP 5

N

L

PUMP 6

N

POWER

ZONE1

ZONE2

ZONE3

ZONE4

ZONE5

ZONE6

T-STAT 2

C

R

W

T

T COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T COM

T-STAT 1

C

R

W

T

T COM

T-STAT 4

C

R

W

T

T COM

T-STAT 5

C

R

W

T

T COM

T-STAT 6

C

R

W

T

T COM

AUX

6 Zone

ZSR106

MASTER

PRIORITY ON

REMOTE ENABLE ON

EXERCISE ON

POST PURGE ZONE#1 ON

SLAVE

OFF

OFF

OFF

OFF

REMOTE ENABLE

24 - 120 VAC

L

N

O

N

O

F

F

STATUS 

DURING

PRIORITY

Boiler connections

XX

 = Dry contact rated up to 120 VAC, 2 Amps, which 

is typically connected to TT on boiler control, closes 
when any zone calls including priority. 

ZONE 1 E/S 

Dry contact rated up to 120 VAC, 2 Amps, will close 
with any call to ZONE 1.  Zone 1 can be enabled as  a priority zone, typically 
used for heating domestic hot water.  The ZONE 1 E/S  can be used to close 
a DHW contact on boiler controls equipped with these features. 

AUX 

= Dry 

contact, rated up to 120 VAC, 2 Amps, close when any zone calls and can be 
used 

as signal to a variable speed self regulated pump or other controls.

Communication connections:

 

Connect terminals to matching terminal of slave boards
D to D, P to P, Ground to Ground. Use 18 gauge 
thermostat wire and it should be shielded if located in 
close proximity to high voltage wiring

L

PUMP 2

N

PRIMARY

PUMP

L

PRIORITY

PUMP 1

N

L

POWER IN

N

GROUNDS

L

PUMP 3

N

TRANSFORMER

L

N

L

PUMP 4

N

L

PUMP 5

N

L

PUMP 6

N

POWER

ZONE1

ZONE2

ZONE3

ZONE4

ZONE5

ZONE6

T-STAT 2

C

R

W

T

T

COM

COMMS

D

P

ZONE 1

E / S

X X

T-STAT 3

C

R

W

T

T

COM

T-STAT 1

C

R

W

T

T

COM

T-STAT 4

C

R

W

T

T

COM

T-STAT 5

C

R

W

T

T

COM

T-STAT 6

C

R

W

T

T

COM

AUX

6 Zone

ZSR106

MASTER

PRIORITY ON

REMOTE ENABLE ON

EXERCISE ON

POST PURGE ZONE#1 ON

SLAVE

OFF

OFF

OFF

OFF

REMOTE ENABLE

24 - 120 VAC

L

N

O

N

O

F

F

STATUS 

DURING

PRIORITY

Summary of Contents for Z-one ZSR103

Page 1: ...DHW capable of switching line voltage t High capacity transformer t Large terminal connections t Simpli ed wiring with extra ground terminals t Heavy duty sealed relays t All pumps fuse protected with...

Page 2: ...ctrical codes WARNING Avoid electrical noise interference Do not install near large conductors electrical machinery or welding equipment Avoid locations where excessive moisture corrosive fumes vibrat...

Page 3: ...is damaged replace control with functional one Mounting Mount the Caleffi Z one switching relay box to a suitable surface Slotted holes are provided for mounting purposes Do not mount to a surface th...

Page 4: ...edbypositioning five dip switches for the following operations Master Slave allows for unlimited expansion to additional ZSR or ZVR relays boards Priority ON OFF When priority switch is ON upon demand...

Page 5: ...es wiring easy Three extra ground screw terminals connection allows fast grounding of pumps eliminating the need for extra wire connectors Pump terminals have 120 VAC outputs for simpli ed pump connec...

Page 6: ...ZONE2 ZONE3 ZONE4 T STAT 2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM AUX 4 Zone ZSR104 MASTER PRIORITY ON REMOTE ENABLE ON EXERCISE ON...

Page 7: ...MP 3 N TRANSFORMER L N L PUMP 4 N L PUMP 5 N L PUMP 6 N POWER ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 T STAT 2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4...

Page 8: ...T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX 6 Zone ZSR106 MASTER PRIORITY ON REMOTE ENABLE ON EXERCISE ON POST PURGE ZONE 1 ON SLAVE OFF OFF OFF OFF REMOTE ENABLE 24 120...

Page 9: ...1 1...

Page 10: ...ump can be operated Zone priority is selectable with 1 hour time out feature Other features include pump exercising selectable post purge and 3 pump ground terminals for simpli ed wiring The ZVR Serie...

Page 11: ...zone valve control Product overview 26 Circuit board 27 Cover removal Transformer Installation 28 Product details 29 C1 Mod Con boiler hydro separator zone valves 30 C2 Mod Con boiler indirect DHW on...

Page 12: ...MP 4 N L PUMP 5 N L PUMP 6 N THM 5 C R W T T COM THM 6 C R W T T COM PWR ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 DipSwitches Master Slave Priority OFF Priority ON Primary OFF Primary ON Exercise OFF Exerc...

Page 13: ...g a Taco 570 valve to Caleffi Z one Relay When connecting the Taco 570 zone valve to the Caleffi Z one Relay the wiring of this valve can only be done in one way The left motor terminal on the ZVR ser...

Page 14: ...0 VAC pump with boiler enable or two devices without boiler enable 5 A capacity each relay 10 A total Rear knock outs for mounting onto 4 x4 junction box High capacity 6VA transformer Simplified wirin...

Page 15: ...p connection Dual labeled T stat terminals Compatible with 2 3 and 4 wire T stats Replaceable fuses 6 VA Transformer Keyhole mounting which fits a 4X4 junction box Pre installed jumper Rear knockout f...

Page 16: ...om power zone transformer N L L RELAY 1 C N O N C C N O N C RELAY 2 Calef single zone relay L N A1 Single thermostat Hydronic diagram is for illustration purposes only some components have been remove...

Page 17: ...the thermostat demand is satisfied R to W will open and the ZONE LED will turn off The control will remove power from relays 1 and 2 opening C to NO This will drop 120 VAC to your pump and terminate t...

Page 18: ...N C C N O N C RELAY 2 Calef single zone relay 4 wire zone valve 4 wire zone valve 4 wire zone valve R W 24 VAC T T R W R W End switch wires L N A2 Multiple thermostats Hydronic diagram is for illustr...

Page 19: ...factory installed jumper between L and C When all the thermostat demands are satisfied the zone valves will close and the end switch will open R to W The ZONE LED will turn off The control will remove...

Page 20: ...TRV TRV TRV R W C T T com power zone transformer N L L RELAY 1 C N ON C C N ON C RELAY 2 ZSR101 T T L N A3 Single master thermostat panel radiators with TRVs variable speed pump Hydronic diagram is fo...

Page 21: ...red room temperatures The room temperatures will then be controlled by each individual thermostatic radiator valve by adjusting the flow through the radiator making this a fitting application for a va...

Page 22: ...re Selectable post purge and exercise Dry contacts X X AUX ZONE 1 E S capable of switching line voltage High capacity transformer Large terminal connections Simplified wiring with extra ground termina...

Page 23: ...labeled T stat terminals Compatible with 2 3 and 4 wire T stats Selectable DIP switches LED for each zone 120 VAC zone pump outputs 120 VAC input power connection ZONE1 ES closes only during a demand...

Page 24: ...release from base Roll cover off base Mounting Do not mount to a surface that exceeds 115 F 45 C The unit must be only located in dry interior locations Use only copper conductor supply wire suitable...

Page 25: ...l PRIORITY PUMP Runs when zone 1 calls Can be programmed to be the priority zone L Line hot leg of 120 VAC to power the pump N Neutral leg of 120 VAC to power the pump Remote Enable allows for input o...

Page 26: ...MMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX 6 Zone ZSR106 MASTER PRIORITY ON REMOTE ENABLE ON EXERCISE...

Page 27: ...close with any call to ZONE 1 Zone 1 can be enabled as a priority zone typically used for heating domestic hot water The ZONE 1 E S can be used to close a DHW contact on boiler controls equipped with...

Page 28: ...ZONE6 T STAT 2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX 6 Zone ZSR106 MASTER PRIORI...

Page 29: ...Freeze Prevention Feature After one hour of a priority demand the control will open the ZONE 1 E S contacts and drop power to PRIORITY PUMP 1 If a call for heat exists from zones 2 6 the control will...

Page 30: ...ONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM AUX 3 Zone ZSR103 MASTER PRIORITY ON REMOTE ENABLE ON EXERCISE ON POST PURGE ZONE 1 ON SLAVE OFF OFF OFF OFF REMOTE ENABLE 24 120 VAC L N O...

Page 31: ...ted to TT on boiler control closes when any zone calls including priority ZONE 1 E S Dry contact rated up to 120 VAC 2 Amps will close with any call to ZONE 1 Zone 1 can be enabled as a priority zone...

Page 32: ...C R W T T COM T STAT 4 C R W T T COM AUX 4 Zone ZSR104 MASTER PRIORITY ON REMOTE ENABLE ON EXERCISE ON POST PURGE ZONE 1 ON SLAVE OFF OFF OFF OFF REMOTE ENABLE 24 120 VAC L N O N O F F STATUS DURING...

Page 33: ...act rated up to 120 VAC 2 Amps which is typically connected to TT on boiler control closes when any zone calls including priority ZONE 1 E S Dry contact rated up to 120 VAC 2 Amps will close with any...

Page 34: ...closed Dry contacts XX AUX ZONE 1 E S capable of switching line voltage Large terminal connections High capacity 40 VA transformer standard for 3 and 4 zone models expandable to 80 VA and 80 VA for th...

Page 35: ...d Power ON LED Dual labeled T stat terminals Compatible with 2 3 and 4 wire T stats Dip switches 120 VAC input power connection Zone valve end switch connection Zone valve motor connections Transforme...

Page 36: ...ttom latch Snap top of transformer into latch arms Feed wiring through hole near the top of the transformer and insert transformer plug into the socket Repeat process for 2nd transformer if using six...

Page 37: ...NSFORMER L PUM T STAT 2 T T COM E S T STAT 3 T T COM T STAT 1 T T COM T STAT 4 T T COM 6 Zone ZSR106 REMOTE ENABLE 24 120 VAC L N L Line hot leg of 120 VAC supply N Neutral of 120 VAC Grounds Input po...

Page 38: ...SYSTEM PUMP N T STAT 2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX O N O F F O N O F F...

Page 39: ...XX Dry contact rated up to 120 VAC 2 Amps which is typically connected to TT on boiler control closes when any zone calls including priority ZONE 1 E S Dry contact rated up to 120 VAC 2 Amps will clo...

Page 40: ...MOTOR ZONE 4 END SWITCH MOTOR ZONE 5 END SWITCH MOTOR ZONE 6 END SWITCH MOTOR L SYSTEM PUMP N T STAT 2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C...

Page 41: ...close the X X contacts to signal the boiler of a demand When all the thermostat demands are satisfied R to W will open and the T STAT CALL and VALVE OPEN LEDs will turn off The X X contacts will open...

Page 42: ...H MOTOR L SYSTEM PUMP N T STAT 2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX O N O F F...

Page 43: ...e control will close the XX contacts to signal the boiler of a demand When all the thermostat demands are satisfied R toWwillopenandthe T STATCALL and VALVE OPEN LEDs will turn off The XX contacts wil...

Page 44: ...PUMP N STATUS DURING ZONE 1 DEMAND ZONE 1 END SWITCH MOTOR ZONE 2 END SWITCH MOTOR ZONE 3 END SWITCH MOTOR ZONE 4 END SWITCH MOTOR ZONE 5 END SWITCH MOTOR ZONE 6 END SWITCH MOTOR L SYSTEM PUMP N T ST...

Page 45: ...The ZONE 1 E S and X X contacts open If a call for heat exists from zones 2 12 the corresponding T STAT CALL will illuminate again and 24 VAC will be delivered to their zone MOTOR terminals When the z...

Page 46: ...S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX O N O F F O N O F F VALVE OPEN ZONE 1 ZONE 2 ZONE 4 ZONE 5 ZONE 3 MASTER P...

Page 47: ...mp terminals SYSTEM PUMP Runs when any zone calls for heat SEC PUMP Runs when any zone calls for heat ZONE 1 PUMP Runs when zone 1 thermostat calls for heat and zone 1 end switch has closed A jumper i...

Page 48: ...2 C R W T T COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX O N O F F O N O F F VALVE OPEN ZONE 1 ZO...

Page 49: ...boiler of a demand When all the thermostat demands are satisfied R to W will open and the T STAT CALL and VALVE OPEN LEDs will turn off The XX contacts will open terminating the demand for heat to the...

Page 50: ...PUMP EXERCISE ON PRIORITY ON AUX ON SLAVE OFF OFF OFF DURING PRIORITY DEMAND 6 Zone ZVR106 L POWER IN N POWER T SAT CALL ZONE 6 L ZONE 1 PUMP N L SEC PUMP N STATUS DURING ZONE 1 DEMAND ZONE 1 END SWIT...

Page 51: ...will open terminating the demand for heat to the boiler The 120 VAC is dropped to the SYSTEM PUMP and SEC PUMP Description of terminals Ground N Neutral Common leg of 120 VAC L Line Hot leg of 120 VA...

Page 52: ...P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM AUX O N O F F O N O F F VALVE OPEN ZONE 1 ZONE 2 ZONE 4 ZONE 3 MASTER PUMP EXERCISE ON PRIORITY ON AUX ON SLAVE OF...

Page 53: ...put The control will close the XX contacts to signal the boiler of a demand and close the AUX contacts to signal the ECM pump to start When all the thermostat demands are satisfied R to W will open an...

Page 54: ...COM COMMS D P ZONE 1 E S X X T STAT 3 C R W T T COM T STAT 1 C R W T T COM T STAT 4 C R W T T COM T STAT 5 C R W T T COM T STAT 6 C R W T T COM AUX O N O F F O N O F F VALVE OPEN ZONE 1 ZONE 2 ZONE 4...

Page 55: ...ose with any call to ZONE 1 Zone 1 can be enabled as a priority zone typically used for heating domestic hot water The ZONE 1 E S can be used to close a DHW contact on boiler controls equipped with th...

Page 56: ...48 Caleffi North America Inc 3883 W Milwaukee Rd Milwaukee WI 53208 Tel 414 238 2360 Fax 44 238 2366 www caleffi com Ask Us caleffi com Copyright 2016 Caleffi North America Inc...

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