Sediment Trap Assembly Instructions; Heater Control Instructions - L.B. White GreenGro Plus HD220 Owner's Manual And Instructions

SEDIMENT TRAP ASSEMBLY
Assemble the tee, nipples and cap together and tighten
securely. See Fig. 8. The sediment trap assembly must
always be mounted in a vertical position. Make sure pipe
thread compound that is resistant to both L.P. gas and
natural gas is used in making all connections. Check all
connections for gas leaks using approved gas leak
detectors.
HEATER CONTROLS
The GreenGro series heaters feature a two-stage gas
control valve and a heat - ventilation switch. These features
expand the capability of the heater to cost effectively
maintain temperature and likewise enhance air circulation
in the greenhouse when heating is not required.
The two-stage gas control valve provides the ability to more
closely match heat to need - starting at the first stage
(minimum or mid-rating position) and only moving to second
stage (maximum or full rating position) if needed to satisfy
the temperature requirements of the building. This
capability results in less temperature variation in the
building and therefore lower fuel consumption. The heater
can be configured to operate in either single stage or two-
stage mode with either a thermostat or building controller.
Note that the heater is wired to start up and run only in the
first stage position as shipped from the factor y.
Connection with a thermostat or building control is
required for further operation. The following instructions
provide interconnections for the two-stage gas control valve
in either single stage or two stage configuration utilizing
either a thermostat or building controller. Before
connecting any thermostat or building control, become
familiar with the heater's electrical connection diagram.
See diagrams on pages 26 and 27 of this manual or on the
heater. Refer to the index below to select specific wiring
interconnections for the temperature control device to be
used.
Index
A. Two Stage Thermostat
B. Single Stage Thermostat
1. Operate on First Stage Heat Only
2. Operate on Second Stage Heat Only
C. Building Controller Connections - Heating
(Using Non-Powered Contacts)
1. Operate on First Stage Heat Only
2. Operate on Second Stage Heat Only
3. Operate Both Stages of Heat
Electrical Shock Hazard
■
Disconnect the heater's electrical supply before
interconnecting the control.
■
Failure to disconnect the electrical supply will result in
electrical shock.
■
Electrical shock will cause severe injury or death.
11
Page
WARNING
FIG. 8
TO GAS CONTROL
VALVE INLET
The GreenGro incorporates a manual heat - vent switch.
When in the 'heat' position, the heater operates normally.
When in the 'vent' position, the heater fan operates
continuously. In the 'vent' mode, the heater then
supplements or provides air circulation within the
greenhouse. This heat - vent capability can be controlled by
a building controller. Before connecting to a building
controller for the heat - vent function become familiar with
the heater's electrical connection diagram. See diagrams
on pages 26 and 27 of this manual or on the heater. Refer
to the index below for specific wiring interconnection
options for the heat - vent capability. Note: when controlling
the heat - vent position with a building controller, if the
building controller is in the 'vent' position it must allow
sufficient time for the fan to come to a complete stop before
switching to the 'heat' mode.
Index
D. Heat-Vent Building Control Connections
(Using Non-Powered Contacts)
E. Heat-Vent Building Control Connections
(Using Powered Contacts)
A. Two Stage Thermostat
(Heater Will Operate on First and Second Stage
Heat)
-- Remove jumper at terminals 8 and 9.
-- Connect wiring of two stage thermostat as shown
in electrical diagram or see below.
11
12
12
9
8 10
NIPPLE
HOSE ADAPTER
TEE
NIPPLE
CAP
THERMOSTAT
YELLOW
BLUE
RED
HI LO
Page
12
13
GROUND
RED
GREEN