IBC Technologies VFC 160 Installation And Operating Instructions Manual - page 13
IBC Technologies Inc.
- 13 -
VFC 160
Table 5 - Max. Pipe Length (ft)
Model
1/2” IPS
3/4” IPS
1” IPS
VFC 160
8
35
120
Gas piping must have a sediment trap
ahead of the boiler’s gas valve (see
Figure 11.). A manual shutoff valve
must be located outside the boiler, in
accordance with local codes/standards.
All threaded joints in gas piping should
be made with a piping compound
resistant to the action of natural gas - do
not use Teflon tape. Use proper hangers
to support gas supply piping.
gas valve inside
union
install manual
main shutoff
valve 5 ft.
above floor
when required
by local code
full size
sediment
trap
Figure 11. Typical Gas Piping
The boiler must be disconnected or
otherwise isolated from the gas supply
during any pressure testing of the system
at test pressures in excess of 1/2 psig.
Dissipate test pressure prior to
reconnecting.
The boiler and its gas piping shall be
leak tested before being placed into
operation.
The gas valve is provided with pressure
taps to measure gas pressure upstream
(supply pressure) and downstream
(manifold pressure) of the gas valve.
1.7 Electrical Connections
All Electrical wiring to the boiler
(including grounding) must conform to
local electrical codes and/or National
Electrical Code, ANS/NFPA No. 70 –
latest edition, or The Canadian Electrical
Code, C22.1 - Part 1.
1.7.1 Mains Hook-up
Line-voltage wiring is done within the
field-wiring box. Referring to Wiring
Diagram on page 26, connect the boiler
to the mains power using a separate,
fused circuit and a disconnect means
within sight of the boiler. Use 14-gauge
conductors in BX cable or conduit
appropriately anchored to the boiler case
for both mains supply and pump circuits.
The transformer primary (black wire) is
connected to the neutral and line (hot)
wires. The red conductors for the pump
contacts should be wired into the
ungrounded leg of the pump circuit.
Note: The combined current of all
pumps connected through the on-board
pump relay (red conductors) should not
exceed 10 amps.
1.7.2 Thermostat wiring
The Thermostat terminal block is located
on the control module. The thermostat
terminals should NOT be connected to
any other power source and should only
be connected to a room thermostat,
isolated, zone valve end switches or
circulator end switches. When using 3-
wire zone valves (non-isolated) the zone
valve end contacts must be isolated from
the thermostat terminals using an
appropriate relay.