HARDT
Responsive, Reliable Solutions
Page 16 of 21
CUS-009-0028-11
Drains
The Inferno 4500 is equipped with two drains (per rotisserie). One drain is for the drainage of the cooking
effluent (1.5" [38.1 mm] diameter) and the other is for the AutoClean drain line (1” NPT-M).
Any liquid drained from the rotisserie will be very hot, it is recommended that copper tubing or other
high temperature rated piping be used for the drain connections.
5.2.1
Plumbing the 1.5” [38.1 mm] grease drain line
The 1.5" [38.1 mm] drain line is the drain line coming from the
drip pan. The effluent from this drain contains high
concentrations of FOG’s (Fats, Oils and Grease) produced
during the cooking process and must be collected in
containers or a grease collection reservoir (Such as Hardt’s
optional GR Series heated grease collection reservoirs) and
transferred to a rendering barrel for proper disposal.
The top rotisserie on a double deck and the single rotisserie
will require the grease drain tubing to be screwed into place as
shown in Figure 5-3. Note: Single units are usually shipped
with the drain tubing preinstalled.
Figure 5-3
5.2.1
Plumbing the 1”
NPT-M AutoClean drain line
Make sure that the AutoClean drain is plumbed in a manner which allows the rotisserie to remain
mobile for servicing. The effluent from this drain may contain Fats, Oils and Greases (FOGs).
Local ordinances may require a backflow prevention device. Consult the authority having jurisdiction
to determine what regulations are in force for appliances of this type as well as regulations regarding
the disposal of grease laden water and FOGs.
The 1” NPT-M AutoClean drain lines from double deck rotisseries must NEVER be plumbed together.
Doing so will cause improper drainage performance and will lead to other plumbing problems.
The 1” NPT-M drain line is located at the exterior lower rear
right corner of the rotisserie. This drain is for the AutoClean
process and is used to drain the water/detergents used during
this process. It may be plumbed directly, as per the
customers’ requirements, to the waste water drainage system.
The part to be used to make the connection is a copper tube
fitting female adapter (1” NPT) for soldering joint piping (Not
sold by Hardt but available through local standard
plumber outlets).
Figure 5-4
SCREW UPPER
TUBING INTO
PLACE
1.5” [38.1 MM]
GREASE DRAIN(S)
1” NPT-M
AUTOCLEAN
DRAIN(S)
COPPER TUBE
FITTING FEMALE
ADAPTER 1" NPT
COPPER SOLDERED
JOINTS 1" TUBES &
90° COPPER ELBOW
