Coates ST SERIES 5.5 & 11kW 240V SINGLE PHASE - Manual (Page 2)

1.0 DESCRIPTION
Coates Spa Heaters are intended for use on spas or
hot tubs having a forced water circulation system.
The water flow through the heater should be at least
15 GPM but should not exceed 80 GPM. Higher
flow may damage the heater. An external bypass
should be installed to limit the flow to within this
range.
2.0 INSTALLATION
CHECK ELECTRICAL CONNECTIONS TO ALL
COMPONENTS within the heater for tightness.
These can become loose during shipment and
handling.
2.1 PHYSICAL PLACEMENT
The Coates Spa Heater is suitable for indoor or
outdoor installation. See Figure 1 for piping
connections and Figures 3A or 3B for electrical
connections. The heater should be securely
mounted to a smooth, flat surface. It may be
conveniently located next to the filtration equipment.
Leave minimum clearances of 9 inches on the
left for element removal, 12 inches on the front
for maintenance, 6 inches on the back for
service entrance and the right side will be
determined by the plumbing configuration used.
2.2 ELECTRICAL INSTALLATION
The electrical supply power must be single phase,
2 wire, 240 VAC. The supply must be protected
by a ground fault circuit interrupter (GFCI) in
accordance with NEC Article 680. An electrical
disconnect with over-current protection must be
provided. An insulated ground conductor must be
provided. See Figures 3A or 3B and Table 1 for
supply wire and circuit sizing. A lug has been
provided for attachment of the BONDING wire per
the NEC Article 680-22, (a)(4). This lug is located
between the inlet and outlet pipes of the heater
10
9
CSTILL1C
FLO W
ELE M.
TE MP ER ATU RE
CO NT RO L ME NU
OU TLE T
INL ET
TEMPERATURE
CONTROL
ELEM. FLOW
8 7
1
3
1
2
6
Coates Spa Heater Assembly
INLET/OUTLET PVC UNIONS
ID ACCEPTS 1 1/2 PVC PIPE
OD ACCEPTS 2" PVC FITTINGS
°F HEATING °C
HE ATI NG
F C
RESET BUTTON
5
RE SE T
4
NOTE: TEMP
CONTROL BULB
ON LOWER LEG;
TEMP LIMIT BULB
ON UPPER LEG
MENU
Figure 2 – Coates Spa Heater Assembly.
Refer to Table 2 for part description.
CAUTION
THE ELECTRICAL INSTALLATION MUST BE IN
ACCORDANCE WITH ARTICLE 680 OF THE
NATIONAL ELECTRICAL CODE (NEC).
WARNING
Only qualified personnel, as defined by National
Electric Code Article 100, should install and
maintain this equipment. Unauthorized alteration
or improper maintenance of this unit may release
the manufacturer from any warranty claims. The
installation must be in accordance with the
instructions in this manual and applicable local
plumbing and electrical codes.
** NOTICE **
NO PRESSURE RELIEF
VALVE IS SHIPPED WITH
THIS HEATER AND NONE
IS REQUIRED PER UL
STD 1261. DO NOT
INSTALL SHUT OFF
VALVE BETWEEN THE
HEATER AND POOL OR
SPA. A CHECK VALVE IS
ACCEPTABLE AND IN
ACCORDANCE TO UL STD
1261 REVISED JULY 1983.
COATES POOL
HEATER
FILTER
POOL
or
SPA
CHECK
VALVE
DRAIN
VALVE
BALL OR GATE
VALVE
PUMP BALL OR GATE
VALVE
CAUTION
DO NOT INSTALL ANY SHUT-OFF
VALVE ON DISCHARGE SIDE OF
HEATER. A SWING CHECK
VALVE IS PERMITTED.
Exception: If a 30 psi (2.1 Kg/cm 2 )
pressure relief valve is installed
between the heater and valve , the
valve may be of the shut-off (ball or
gate) type.
FIGURE 1 – PIPING DIAGRAM