Lochinvar Knight XL 399 - 800 - Manual (Page 33)

Installation & Operation Manual
33
RELIEF VALVE
TEE WITH 3/4” FITTING ON TOP
CLOSE NIPPLE (FIELD PROVIDED)
CLOSE NIPPLE
TEE WITH FITTING ON TOP
(FIELD PROVIDED)
TEMPERATURE AND
PRESSURE
GAUGE
PADDLE
FLOW SWITCH
CLOSE NIPPLE
TEE WITH 1” FITTING ON TOP
CLOSE NIPPLE
NOTICE
Be sure to install the flow switch so that
the arrow on the flow switch is pointing in
the direction of the flow (see FIG. 6-3).
Figure 6-2 Flow Switch, Relief Valve and Temperature
and Pressure Gauge Installation_Models 600 - 800
Flow switch, relief valve and temperature
and pressure gauge installation
Basic steps are listed below to guide you through the
installation of the flow switch, relief valve, and temperature
and pressure gauge provided with the unit.
1. For Models 399 - 500 install the close nipple on the outlet
connection of the heat exchanger. Install the tee with the
3/4 inch fitting positioned vertically and on the top as
shown in FIG. 6-1. For Models 600 - 800 install the tee
directly to the outlet connection of the heat exchanger
with the 3/4 inch fitting positioned vertically and on the
top (see FIG. 6-2).
2. For Models 700 - 800 install the 3/4 inch close nipple in
the tee. Install the relief valve on the 3/4 inch close nipple
(FIG. 6-2). For Models 399 - 600 install the relief valve
directly into the 3/4 inch fitting on the tee (FIG. 6-1).
3. Install the close nipple on the downstream side of
the relief valve tee (FIG. 6-1).
4. Install the tee with the 1 inch fitting positioned
vertically and on the top (FIG. 6-1).
5. Attach paddle #3 to the flow switch per the
manufacturer’s instructions.
6. Install the assembled flow switch into the 1 inch fitting of
the tee installed in Step 4 (see FIG. 6-1).
7. Install a field provided close nipple on the downstream
side of the flow switch (see FIG.’s 6-1 and 6-2).
8. Install a field provided tee with the gauge fitting
positioned vertically and on the top (FIG.’s 6-1 and 6-2)
9. Install the temperature and pressure gauge provided
with the unit into the top fitting of the tee (a bushing
may be necessary) installed in Step 8 (FIG.’s 6-1 and 6-2).
RELIEF VALVE
TEE WITH 3/4” FITTING ON TOP
CLOSE NIPPLE (FIELD PROVIDED)
CLOSE NIPPLE
TEE WITH FITTING ON TOP
(FIELD PROVIDED)
TEMPERATURE AND
PRESSURE
GAUGE
PADDLE
FLOW SWITCH
CLOSE NIPPLE
TEE WITH 1” FITTING ON TOP
Figure 6-1 Flow Switch, Relief Valve and Temperature
and Pressure Gauge Installation_Models 399 - 500
6
Hydronic piping