INSTALLATION GUIDE · USER MANUAL
GAS HEATER SERIES
6
PIPING RECOMMENDATIONS
G&D
Heater units are fited
with
1-
½” female NPT
connec�ons for glycol supply and return.
Appropriate
fi�ngs will be needed
on process tanks/jackets.
Confirm tank jackets have been flushed of any debris
before connec�ng to them for the first �me.
It is
highly
recommended that a 20
-
mesh wye
-
strainer is installed at
the return connec�on.
Individual tank temperature control package should be
installed at each vessel to maintain op�mal condi�ons for
each process being heated.
Always connect the glycol supply to the botom fi�ng on
the tank jacket and the return to the top. This allows any
air in the jacket to be purged back to the heater reservoir
and vented to the atmosphere.
G&D Heaters are typically designed to
run a 35% glycol/water mixture. Confirm
glycol concentra�on with the included
refractometer prior to opera�on.
Glycol pressure is adjustable:
Verify tank jacke
t
ra�ngs before pressurizing system
(pressure is pre
-
set at
25 PSI).
Heater contains dynamic fluid bypass valve and pressure gauge on supply line
:
•
Bypass valve: Loosen packing nut and turn handwheel to adjust supply pressure
•
Re-
�ghten bypass valve packing nut once the pressure is set
No�ce: Do not allow glycol flow to tank
s
un�l gauge
shows
supply pressure
within tank jacket
ra�ngs!
QUICK-START PROCEDURE
1.)
Connect control panel to an appropriate power
source
.
2.)
Ensure that all pump isola�on valves are open!
3.)
Flush the piping system with water. Do not allow debris to enter the reservoir of the heater unit.
4.)
Fill reservoir with 35% propylene glycol mixture.
5.)
Confirm pump rota�on if using 3 phase power
.
6.)
Be sure the gas type connected to the heater matches the type listed on the Rinnai unit
7.)
Turn door switch to the “ON” posi�on
.
8.)
Adjust set point using the arrow keys on the Dwyer temperature
controller, found inside the
electrical enclosure
9.)
Be sure to fill out the “Warranty Start
-
up Checklist” and send a completed copy to G&D Tech
Support!