DriSteem HUMIDI-TECH, HUMIDI-TECH DI, VM-2, VM-4, VM-6 Installation, Operation And Maintenance Manual

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HUMIDI-TECH and

HUMIDI-TECH DI

ELECTRIC STEAM HUMIDIFIERS

Installation, Operation

and

Maintenance Manual

®

2

TABLE OF CONTENTS

To the purchaser and installer

Thank you for purchasing our HUMIDI-TECH® humidifier. We have designed and built this equipment to give
you complete satisfaction and trouble-free service for many years. Familiarizing yourself with this manual will
help ensure proper operation of the equipment for years to come.

This manual covers the installation and maintenance procedures for both the HUMIDI-TECH and
HUMIDI-TECH DI humidifiers.

DRI-STEEM Humidifier Company

General information

Product overview ................................................................. 3

Dimensions .......................................................................... 4

Electrical specifications, capacities and weights ................. 5

Installation

Locating and mounting the humidifier .................................. 6

Piping ................................................................................... 6

Wiring .................................................................................. 9

Dispersion

Using space distribution units (SDU-E and SDU-I) ..... 11

Using dispersion tubes ................................................ 14

Using a RAPID-SORB® dispersion assembly ............. 16

Drip tee installation ...................................................... 17

Interconnecting piping tables ....................................... 18

Operation

Start-up procedures ........................................................... 19

Control ............................................................................... 20

Maintenance

Maintenance procedures ................................................... 21

Troubleshooting guide ....................................................... 24

Replacement parts............................................................. 26

Warranty ........................................................................... 32

3

HUMIDI-TECH® HUMIDIFIER OVERVIEW

Deionized water models
(HUMIDI-TECH DI)

The HUMIDI-TECH DI, shown here,
is specifically designed for use with
deionized or reverse osmosis water.

Standard water models
(HUMIDI-TECH)

The standard water HUMIDI-TECH unit
requires water conductivity of at least
100 µS/cm to operate. It will not
operate with water treated
by reverse osmosis or
deionization processes
(see DI water model below).

OM-82-4

Removable
evaporating
chamber

Slide assembly under evaporating chamber
provides easy removal for cleaning

INCOLOY alloy-sheathed
immersion heaters

Keyholes for
wall mounting

Water fill DN10
(3/8") (female)

DN40 or DN50 flexible
vapor hose, pipe or
tubing connects to
dispersion tube(s) or
to an SDU

Condensate
return line

Duct

Electrical area

Electrical conduit
knockouts

DN20 (¾") threaded
skimmer port and
overflow drain

Water fill access hole

Condensate
return line

Electrical area

Removable
evaporating
chamber

INCOLOY alloy-sheathed
immersion heaters

Duct

Electrical conduit knockouts

Slide assembly under
evaporating chamber provides
easy removal for cleaning

Water fill access hole

Keyholes for
wall mounting

Water fill DN10
(3/8") (female)

Float cutoff switch

OM-82-5

Ball valve

DN20 (¾") threaded skimmer
port and overflow drain

DN40 or DN50 flexible vapor
hose, pipe or tubing connects to
dispersion tube(s) or to an SDU

4

HUMIDI-TECH® DIMENSIONS

50 mm

409 mm

57 mm

472 mm

146 mm

38 mm

Venting

DN20 (¾") tank drain

DN20 (¾") frame drain

57 mm

DC-1167

13 mm hole in base
for water fill line

Power wire
knockout

Steam outlet

276 mm

57 mm

Top view

614 mm

Power wiring
knockout

Left side view

Front view

614 mm

16 mm

19 mm

38 mm

146 mm

Bottom view

Control wiring
knockout

50 mm

25 mm

Control or SDU
wiring knockout

5

HUMIDI-TECH® SPECIFICATIONS

Electrical specifications, capacities and weights

Table notes:

All HUMIDI-TECHs operate at 50/60 Hz.

* For wire sizing, the highest leg draw is shown

due to current imbalance.

** SDU-E is not an available option for these

HUMIDI-TECH models if using SSR control.

*** Models with SDU or SSR options have

additional electronic components housed within
the HUMIDI-TECH cabinet. Therefore, if
adding an SDU or SSR, add the following to the
HUMIDI-TECH shipping and operating weights:

– SDU-I: 5.5 kg
– SDU-E: 4 kg
– SSR control: 1 kg

Model

number

kW

Single-phase 230 V Three-phase 400 V

Shipping

weight

kg***

Operating

weight

kg***

Steam

capacity kg/h

I max. A

Steam

capacity kg/h

I max. A

VM-2 2 2.5 8.0 2.7 -- 36 43

VM-4 4 5.0 16.0 5.4 8.7* 36 43

VM-6 6 7.5 24.0 8.2 13.0* 40 55

VM-8 8 10.0 31.9 10.9 17.3* 40 55

VM-10 10 12.5 39.9 13.6 15.2* 42 63

VM-12 12 15.0 47.9 16.3 17.3 42 63

VM-14 14 17.5 -- 19.1 20.2 42 63

VM-16 16 20.0 -- 21.8 23.1** 42 63

VM-21 21 26.3 -- 28.6 30.3** 43 69

VM-25 25 31.3 -- 34.0 36.1** 43 69

VM-30 30 37.6 -- 40.8 43.3** 46 71

VM-34 34 42.6 -- 46.3 49.1** 46 71

Notes about SDUs (Space Distribution Units):

 The SDU-I is available for models VM-2 through

VM-10.

• The SDU-E is available for all HUMIDI-TECH
models except Models VM-16 through VM-34
using three-phase 400V power with the SSR
control option.

 SDUs ship separately from the HUMIDI-TECH.

SDU weights

SDU

model

Shipping weight

Operating weight

kg kg

SDU-I 31 26

SDU-E 28 23

6

HUMIDI-TECH piping

Water makeup piping may be of any code­approved material (copper, steel, or plastic). The
final connection size is DN10 (3/8"). In cases where
water hammer may be a possibility, a shock arrestor
should be considered. Water pressure must be
between 175 kPa and 550 kPa.

Drain piping may be of any code-approved material
(copper, steel, or plastic rated for 100 °C minimum).
If drainage by gravity is not possible, use a small lift
pump (DRI-STEEM Part No. 400281).

The final connection size is DN20 (3/4") for tank and
frame drains. This connection size should not be
reduced. (See figures on the following pages for
proper drain piping configurations.) The tank drain
should be piped separately from the frame drain, as
shown, to prevent backflow of drain water into the
humidifier cabinet.

Install a union in the water supply line as shown
in the drawings on the next two pages to allow
tank removal.

Locating and mounting the humidifier

The HUMIDI-TECH humidifier is designed to attach
to the wall with coach screws, and it should be
installed in a space located near an air duct system.

Consider the following when selecting the location of
the humidifier:

• Convenient access to duct

• Electrical and plumbing connections

• Required clearances

• External water seal requirements

Electrical power supply, water makeup piping and
drain piping must also be considered. Electrical
power supply connections are made at the lower or
upper right rear corner of the unit. Water makeup
and drain piping connections are made at the lower
left rear corner.

When mounting on a stud wall (studs with 406 mm
centres), locate studs and position coach screws in
place so that each of the screws (406 mm apart) will
center on a stud. Mark hole locations and predrill
6 mm diameter pilot holes using mounting template
on the HUMIDI-TECH box. Secure frame to wall with
coach screws provided.

For hollow block or poured concrete wall mounting,
position template in place and mark the holes. Drill
appropriate pilot hole for two 10 mm toggle bolts or
two 10 mm machine bolt lead anchors. Secure frame
in place.

HUMIDI-TECH® MOUNTING AND PIPING

Clearance recommendations

For recommended service and maintenance
purposes, maintain the following clearances:

Top: 460 mm

Floor: 610 mm

Supporting
wall

Left side:
305 mm

DC-1201

Right side electrical
controls: 915 mm

Front: 915 mm

Secured to
supporting
wall

To dispersion
unit

7

HUMIDI-TECH® PIPING

Notes:

• Offset humidifier from spill funnel or floor drain to prevent flash steam from rising into the cabinet.

• Dashed lines indicate provided by installer.

• The water supply inlet is more than 25 mm above the skim/overflow port, eliminating the possibility of
backflow or siphoning from the tank. No additional backflow prevention is required, however, governing
codes prevail.

• Install a union in the water supply line as shown to allow tank removal.

Shock arrester
recommended to
reduce water hammer

DN10 (3/8") connection to water
supply line; water pressure must be
between 175 kPa and 550 kPa;
water conductivity minimum
100 µS/cm

Water supply line

Spill funnel.
Plumb to
floor drain

25 mm
air gap

DN20 (¾") tank
drain, skimmer and
P-trap piping, rated
for 100 °C. If piping
run is over 3 m
increase pipe to
DN32 after P-trap.

Open floor drain.
Refer to governing
codes for drain pipe
size and maximum
temperature requirements.

Cover

Electrical conduit
knockouts provided
top and bottom:

• Combination, with
knockout diameters
of 22.3 mm and

28.6 mm

• Combination, with
knockout diameters
of 28.6 mm and

34.9 mm

Install level

Steam vapor hose
(maximum run 3 m).
May also use pipe or
tubing.

DC-1136

DN20 (¾")
frame drain and
P-trap piping, rated for
100 °C

Two keyholes for wall
mounting, 406 mm
on center

300 mm

50 mm

HUMIDI-TECH (standard water) field piping overview

Frame drain

Unions by installer

8

HUMIDI-TECH® PIPING

HUMIDI-TECH DI (deionized/reverse osmosis water) field piping overview

DN10 (3/8") connection to water
supply line; water pressure must
be between 175 kPa and 550 kPa;
water chloride content must be less
than 3 ppm; first 1 m of supply line
must be rated for 100 °C

Water supply line

Spill funnel.
Plumb to
floor drain

25 mm
air gap

DN20 (¾") tank drain and P-trap
piping, rated for 100 °C; if piping
run is over 3 m increase pipe to
DN32 after P-trap

Open floor

drain. Refer to

governing codes for drain

pipe size and maximum

temperature requirements.

Cover

Electrical conduit
knockouts provided
top and bottom:

• Combination, with
knockout diameters
of 22.3 mm and

28.6 mm

• Combination, with
knockout diameters
of 28.6 mm and

34.9 mm

Install level

DC-1139

DN20 (¾")
frame drain and
P-trap piping, rated for
100 °C

Two keyholes for
wall mounting,
406 mm on center

300 mm

50 mm

Frame drain

Strainer,
by installer

If water piping to humidifier is non-metallic,
we recommend a 50 mm water seal in the
supply line to isolate steam during DI/RO
water system maintenance

Notes:

• Offset humidifier from spill funnel or floor drain to prevent flash steam from rising into the cabinet.

• Dashed lines indicate provided by installer.

• The water supply inlet is more than 25 mm above the overflow port, eliminating the possibility of backflow or
siphoning from the tank. No additional backflow prevention is required, however, governing codes prevail.

• Install a union in the water supply line as shown to allow tank removal.

Unions by
installer

Steam vapor hose
(maximum run 3 m).
May also use pipe or
tubing.

9

HUMIDI-TECH wiring

All wiring must be in accordance with all
governing codes, and with the HUMIDI-TECH® or
HUMIDI-TECH DI wiring diagrams. The diagrams
are located inside the removable subpanel cover on
the right-hand side of the humidifier cabinet. Power
supply wiring must be rated for 105 °C.

Refer to the maximum load (I max. A) on the rating
plate, and use the tables on the following page to
determine the appropriate wire, conduit and fused
disconnect requirements.

When selecting a location for installing the
HUMIDI-TECH, avoid areas close to sources of
electromagnetic emissions such as power
distribution transformers.

Grounding requirements

The earth must be made by solid metal to metal
connections. The ground must be a good radio
frequency earth. Ground wire should be same size
as power wiring.

Shielded/screened cable drain wire connection to lug

Note: For maximum E.M.C. effectiveness, all humidity, temperature, and airflow controls should be wired

using multicolored shielded/screened plenum-rated cable with a drain wire for the shield/screen. The drain
wire should be connected to the shield/screen ground terminal with its length kept to less than 50 mm.

Shield/screen ground lug

Microprocessor
board

VAPOR-LOGIC

3

keypad on front of
cabinet

OM-1505

HUMIDI-TECH® WIRING

Field wiring requirements

Note: Control wiring and power wiring must be run in

dedicated or separate earthed metal conduit, cable
trays or trunking.

OM-1007

Fused disconnect
(provided by
installer) sized per
tables on next page

Power supply
(provided by
installer) cable
sized per tables
on next page

0.6 m to 1.9 m,

1.7 m recommended

Right side view of HUMIDI-TECH

10

Fuse/breaker requirements

Note:

Semiconductor
fusing is
recommended
with the SSR
option.

230 Volt single phase

A

Wire size

mm

2

Groun d wire size

mm

2

0 - 18 2.5 2.5

18.1 - 24 4 4

24.1 - 30.7 6 6

30.8 - 42.7 10 10

42.8 - 57 16 16

57.1 - 75.7 25 16

75.8 - 93.7 35 16

93.8 - 113.2 50 25

113.3 - 144 70 35

144.1 - 174 95 50

174.1 - 201.7 120 70

400 Volt three phase

I max. A Breaker size

0 - 8.0 10

8.1 - 10.4 13

10.5 - 12.8 16

12.9 - 16 20

16.1 - 20 25

20.1 - 25.6 32

25.7 - 32 40

32.1 - 40 50

40.1 - 50.4 63

50.5 - 64 80

64.1 - 80 100

80.1 - 100 125

100.1 - 128 160

128.1 - 160 200

A

Wire size

mm

2

Ground wire size

mm

2

0 - 15.7 2.5 2.5

15.8 - 21 4 4

21.1 - 27 6 6

27.1 - 37.5 10 10

37.6 - 51 16 16

51.1 - 66.7 25 16

66.8 - 82.5 35 16

82.6 - 100.5 50 25

100.6 - 128.2 70 35

128.3 - 155.2 95 50

155.3 - 179.2 120 70

HUMIDI-TECH® WIRING