INSTALLATION GUIDE · USER MANUAL
GAS HEATER SERIES
G&D CHILLERS, INC.
•
GD
-
MNL
-
GSHTR_R2024B
5
GLYCOL HEATER DESCRIPTION
RINNAI RL94i WATER HEATING UNIT
A chassis mounted
water heater
with exhaust
port
. The
RL94i burns natural gas or propane
to
produce heat.
CIRCULATION PUMP
Base mounted end suc�on centrifugal pump.
Impeller trim
is op�mized
for
a
35% propylene
glycol mixture
.
RESERVOIR TANK
Constructed
s
tainless steel, insulated with ½”
closed cell foam insula�on
.
SUPPLY & RETURN PIPING
Constructed of type M copper. Supply and return
connec�ons NPT or ASME flange. Includes gauge
for se�ng discharge pressure.
DYNAMIC FLUID BYPASS VALVE
Allows for balancing of discharge pressure. Over
pressure design allows circui�ng back to tank
without damage to system or pump. Copper and
bronze construc�on.
FRAME & HOUSING
Fully powder
-
coated steel frame. Durable
powder
-
coated aluminum cover panels
.
Louvered access panel
s
for easy service and
maintenance. Integrated fork pockets for
convenient and safe li�ing
.
POWER & CONTROLS
All power star�ng controls and safety/opera�ng
controls are mounted in a weather
resistant steel
NEMA 3R
enclosure. Features include:
•
Rinnai MCC
-601-
W temp display
•
Ranco ETC
-111000
over
-
temp
protec�on
•
Dwyer
TSW-150
main thermostat
•
P
ump contactor
s
•
Panel
-
mount key switches
FACTORY TESTING
All heater units are leak checked
, run-
tested
,
and
verified
at the factory
to be in perfect
working
order prior to shipping.
INSTALLATION REQUIREMENTS
All installa�on work must be performed by licensed professionals with the
appropriate qualifica�ons:
1.)
U
nit should sit on a solid level surface
–
a concrete pad is
recommended
.
Securely anchor the unit in place
.
2.)
Supply unit with the proper voltage and protect against power spikes
.
Refer to torque chart. Unit must be properly grounded.
3.)
Unit must be
connected to a source of gas
.
G&D
Heaters
can only run
one type of gas (LP
or
NG) which must be specified at �me of order
.
No�ce:
Ensure
gas type (
LP vs. NG)
is correct for
the
G&D Heater
being installed!
4.)
On systems with three
-
phase pumps, the rota�on of the pump must
be checked; clockwise from back of motor. If needed, correct phasing
by swapping two legs of power at the main distribu�on blocks in the
heater electrical enclosure.
TORQUE CHART
Gauge
lbf
·
in
1000-500
550
500-4
500
350-6
375
250-6
375
4/0
-6
275
2/0
-14
120
#2 - #3
50
#4 - #6
40
#10 - #14
35
WARNING: OBEY ALL APPLICABLE LOCAL/ NATIONAL
SAFETY CODES WHEN INSTALLING THIS HEATER
NOTICE: REVIEW THE RINNAI RL94I MANUAL (APPENDIX A) PRIOR TO INSTALLING THE G&D HEATER