Part 7 - Connecting Electrical Service; Wiring; Connecting Power (120V) For Dhw And Ch Circulators; Low Voltage Wiring Connections - NTI FTVN085 Installation Start-Up Maintenance

WARNING
Install wiring and electrically ground boiler in accordance with the
authority having jurisdiction or, in the absence of such an authority,
follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical
Code-Part 1 in Canada. Failure to follow all applicable local, state, and
national regulations, mandates, and building supply codes for guidelines
to install the electrical power supply could result in property damage,
serious personal injury, or death.
ELECTRICAL SHOCK HAZARD – To ensure safety, turn off electrical
power supply at service entrance panel before making any electrical
connections to avoid possible electric shock hazard. Failure to do so
could result in property damage, serious personal injury, or death.
Jumping out control circuits or components WILL VOID product warranty
and can result in property damage, personal injury, or death.
It is of extreme importance that this unit be properly grounded. It is very
important that the building system ground is inspected by a qualified
electrician prior to making this connection. Electrical power must only
be turned on when the boiler is completely filled with cold water. Failure
to follow these instructions could result in component or product failure,
serious injury, or death.
CAUTION
Label all wires prior to disconnecting when servicing the boiler. Wiring
errors can cause improper and dangerous operation. Failure to follow
these instructions may result in property damage or personal injury.
A. Wiring
The boiler is equipped with a three prong power cord. The boiler is
limited to a maximum of 15 amps at 120 volts in use.
Figure 48 - Proper Grounding
1. This boiler must be properly grounded. Ensure the electrical
receptacle is properly grounded. Do not remove the grounding
prong from the boiler plug.
2. Do not attach the ground wire to either the gas or water piping.
3. The wiring diagrams in this manual are to be used for reference
purposes only.
4. Refer to these diagrams and the wiring diagrams of any external
controls used with the installation when wiring the boiler. Read,
understand, and follow all wiring instructions supplied with the
controls.
5. Do not disconnect the power supply when the boiler is in normal
operation.

Part 7 - Connecting Electrical Service

NOTE: For additional electrical protection, the use of a whole house
surge protector is recommended. Damage caused by power surges IS
NOT covered by the warranty.

1. Connecting Power (120V) for DHW and CH Circulators

To connect power for the CH and DHW external pump at the boiler
junction box:
1. Shut off the power supply at the boiler and at the circuit breaker.
2. Shut off the gas at the manual shutoff.
3. Remove the boiler front cover.
4. Disconnect the three clips and open the junction box
5. Insert the circulator power cable through the hole in the side
panel; use an appropriate strain relief/conduit hub to secure the
cable to the side panel.
6. Connect the cable on the connector CN5 (CH pump) and CN4
(DHW pump). See Electrical Wiring Diagram, Figure 54.
C N 4
L
DHW PUMP
Figure 49 - 120V Connections for DHW and CH Circulators
7. Verify that the new cable is correctly positioned inside the control
panel.
8. Reconnect the cover of the junction box.
9. Reinstall the boiler front cover
10. Restore gas to the boiler.
11. Restore power to the boiler.

2. Low Voltage Wiring Connections

To access the low voltage wiring connections:
1. Shut off the power supply at the boiler and at the circuit breaker.
2. Shut off the gas at the manual shutoff.
3. Remove the boiler front cover.
4. Remove the screw securing the control panel to the cross-member.
5. Push in the tabs and pull the control panel housing forward.
6. Disconnect the two clips. See Figure 50.
Figure 50 - Disconnecting the Two Clips
C N 5
N L N
CH PUMP
49