Amtrol TD-41ZDW Separate Circulator, Connect boiler supply pipe. Figure, Refill the boiler system

Step 5 - Connect boiler supply pipe. Figure 1.

a.Shut off the cold water supply valve to the boiler, and drain it using a hose attached to the drain valve at the boiler.

b.When the boiler system piping is drained, cut the piping to accommodate the supply line tee. Install the tee between the boiler supply outlet and any system zone valve or flow check.

c.Connect the circulator flange and mount the circulator to the boiler supply. Be sure the flow arrow points towards the BOILER MATE™. Mount the second flange to the circulator.

d.Connect a 3/4" NPTM to a 3/4" sweat adapter to the second circulator flange.

e.Using short lengths of tubing, connect the 3/4"shut- off valve.

f.Run the 3/4"copper tubing with necessary fittings to the point of connection to the boiler supply tee.

Step 6 - Connect boiler return pipe. Figure 1.

a.Connect the 3/4" NPT, boiler return fitting and connect the drain valve and union.

b.Sweat a short length of tubing to the adapter and connect the weighted check valve with the flow towards the boiler (preventing flow towards the BOILER MATE™). Failure to do so will result in the BOILER MATE™ overheating.

c.Run the 3/4" tubing and fittings as required to the point of connection to the boiler return.

NOTE: This point must be between the boiler return tapping and any system circulator(s). Failure to do so will result in the BOILER MATE™ overheating.

Step 7 - Refill the boiler system

a.Open the cold water supply valve to the boiler.

b.Check for system leaks.

c.Close the weighted check valve on the boiler return piping of the BOILER MATE™

d.Open the drain valve on the boiler return line to release entrapped system air.

e.Close the drain valve

f.Open the weighted check valve.

C. ELECTRICAL WIRING

All wiring must be in accordance with local codes, regulations, and ordinances or, in the absence of such codes, the National Electrical Code ANSI/NFPA No. 70, latest edition.

The BOILER MATE™ thermostat can be used for either 24 or 120V AC. The thermostat is packaged separately and is installed by sliding the capillary tube into the thermostat well.

Electrocution hazard. First dis-connect all electrical power before doing any electrical work.

Electrocution hazard. The BOILER MATE™ must be electrically grounded.

Electrical supply must come from the boiler side of boiler’s emergency shut-off switch in order to prevent

unsafe boiler operation.

SEPARATE CIRCULATOR

I. BOILER MATE™ as Separate Zone - Non-Priority

A. Use of separate BOILER MATE™ ZONE CIRCULATOR

Step 1 - Disconnect electrical power.

a.Turn off the boiler service switch.

b.Turn off the safety switch (if separate from the service switch).

c.Switch off the branch circuit breaker.

Step 2 - Remove electrical box cover on Thermostat.

Step 3 - Wire BOILER MATE™ using

Schematic #1 or #2.

a.Install BX connector.

b.Insert outside wiring to BOILER MATE™ through electrical conduit opening on thermostat.

c.Complete exterior electrical wiring per Schematic #1 or #2.

Step 4 - Turn boiler low-limit control (it is part of the boiler control) to the off position.

Note: Some boilers require minimum setting of low limit.

SEPARATE CIRCULATOR

Step 5 - Adjust boiler high-limit control to the desired setting. In most cases 180° F to 200° F

is acceptable.

Step 6 - Re-assemble electrical box cover. Step 7 - Re-connect electrical power.

B.Use of only the heating system circulator.

When wiring a separate zone valve, follow all steps in 1A except for Step 3c. Use Schematic #3(A, B or C) depending upon the type of zone valve. (Zone valve sizing per pg. 5)

II. BOILER MATE™ - Priority Wiring

Hot Water Before Space Heating

A. Use of separate BOILER MATE™ zone.

A DPDT relay is to be used. Refer to Schematic #4.

Step 1 - Disconnect electrical power.

a.Turn off the boiler service switch.

b. Turn off the safety switch (if separate from

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