Lennox V8DRNP-04 (12A57) Water Pump Kit Installation guide

Brand: Lennox

Model: V8DRNP-04 (12A57) Water Pump Kit

Type: Installation guide

Page 1

OPTIONAL WATER PUMP KIT V8DRNP-04 (12A57) USED WITH LENNOX VRF INDOOR UNITS

Litho U.S.A

507516-01

11/2014 Water Pump Kit

VRF KITS & ACCESSORIES

Dallas, Texas, USA

WARNING

As with any mechanical equipment, personal injury can

result from contact with sharp metal edges. Be careful

when handling equipment.

Shipping & Packing List

Package 1 of 1 contains the following:

1 - Assembled drain pump

1 - Flexible drain hose

3 - Screws

Application

Optional water pump V8DRNP-04 (12A57) is used with

Lennox VRF indoor units to provide vertical lift to ensure

proper condensate draining. Refer to product specifica

tions bulletin for unit usage.

Installation

1 - Install the indoor unit per the installation instructions

provided in the unit.

2 - Use the provided screws to secure the water pump

to the outside of the cabinet. Make sure that screws

are tightly fastened. See figures 1 and 2.

3 - Use hose clamps to connect the provided flexible

hose to the pump inlet and the main condensate

drain connection on the indoor unit. See figure 2.

NOTE - All joints must be leak-free as these will all

be installed above finished spaces.

4 - Connect the water pump power wiring plug and wa

ter level sensor plug to the appropriate jacks on the

unit control. Refer to the specific unit wiring diagram

on the indoor unit. Connect the green ground wire to

an earth ground. See figures 1 and 3 and wiring dia

gram on unit.

5 - Install field-provided 1-inch drain pipe at pump outlet.

Again, connection to pump must be leak-free to

avoid damage to finished spaces in the building. See

figure 4.

Take care to apply the following rules when installing

the drain line:

● The drain must include a U-shaped backflow pre

venter as shown in figure 4.

● The drain line must maintain a constant slope of ¼”

per foot to ensure proper drainage. See figure 4.

● The drain line and all connections must be insulat

ed to avoid condensation on the line. See figure 4.

● The drain line must be supported approximately

every 3 feet to prevent sagging. See figure 4.

● There must be a 2-inch space between the end

of the condensate drain and the final termination

point (ground, open drain, etc.) to ensure that the

line will drain freely.

IMPORTANT !

Drain should have a slope of at least ¼ inch per foot

and should be fabricated using an approved corro

sion-resistant pipe.

6 - After system installation is complete, the con

densate drain line must be checked for leaks and

the condensate pump(s) must be checked to en

sure proper operation. This check is part of the

commissioning sequence. Funnel enough water to

engage the pump (if used) into the drain pan through

a flexible tube.

IMPORTANT !

You must confirm operation of every drain and

pump in the system as part of the commissioning

procedure.

PUMP HOUSING

FIGURE 1. Parts Arrangement

USE THREE PROVIDED

SCREWS TO SECURE

PUMP TO OUTSIDE OF

UNIT CABINET

PUMP TOP COVER

(Remove for installation)

PUMP OUTLET

PUMP INLET

PUMP OUTLET

(to drain)

PUMP

WATER LEVEL

SENSOR

FLEXIBLE

DRAIN HOSE

TO MAIN CONDENSATE

DRAIN ON INDOOR UNIT

Page 2

FIGURE 2. Pump Installation

SECURE PUMP

TO UNIT USING

PROVIDED

SCREWS

USE HOSE CLAMPS TO

SECURE PROVIDED HOSE TO

PUMP AND INDOOR UNIT

FIGURE 3. Pump Installation (Continued)

INDOOR UNIT

AUXILIARY

DRAIN

PUMP COVER

(Replace after

installation)

CONNECT PUMP POWER PLUG,

GROUND WIRE AND WATER LEVEL

SENSOR WIRE PER STEP 4.

PUMP OUTLET

(to drain)

FIGURE 4. Condensate Drain

≤ 6 in. ≤ 4 in. BACKFLOW

PREVENTER

WRAP DRAIN PIPE AND ALL

CONNECTIONS TO PRE

VENT CONDENSATION

SUPPORT

STRAPS

INSULATION

DOWNWARD SLOPE OF ¼

INCH PER FOOT

APPROXIMATELY

3 FEET

Lennox V8DRNP-04 (12A57) Water Pump Kit Installation guide

Lennox V8DRNP-04 (12A57) Water Pump Kit Installation guide

Lennox V8DRNP-04 (12A57) Water Pump Kit Installation guide

Related papers

Other documents