DYC deicer Use SOP
12 Nov 2016

General

Every December DYC installs 20 deicers to protect the pier from ice damage. The only function of the deicers is pier protection, while this may also protect boats left in the water over winter, DYC is not attempting to protect boats and is not responsible for any damage to boats. The deicers are motors with propellers that move the water around the pier to keep it from freezing. They are stored on shelving in the front of the equipment trailer.

Photo of deicer

If the water freezes around the pilings, tidal lifting and ice motion will lift or lean pilings resulting in dock damage. Deicers are installed between outer pilings on both sides of the pier to move water towards the shore and remain in the water all winter. Other deicers are placed along the pier to move water under the pier and towards the ramp and remain on the dock until needed. deicers are only powered on when ice starts developing on the creek. Some years deicers may not be used while other years they will be active for two to eight weeks.

Preparation

  1. Remove deicers from trailer and sort into following groups:
    1. 3/4 hp (standard size units)
      1. red group – 4 units
      2. green group – 4 units
      3. all others – 10 units (and 1 spare)
    2. 1/2 hp units
      1. 2 units – both have blue tops
  2. take the red and green group to the boat ramp for loading on the boat. Boat crew will install as follows:
    1. reds – on north/port side outer pilings
    2. greens – on starboard/south side outer pilings
  3. take all other units to dock for placement (use chart below for install)

General Notes

  • built-in cords on all outboard units are same length.
  • deicers use ONLY 30A circuits (no household circuits).
  • all 30A marine circuits are accessed via Y-connector adaptor (ie. pigtail). Max 2 deicers per box.
  • any boat plugged-in to a 30A box (ie. circular plug) will have to adapt to the Y-connector.

Install Notes

  • careful not to put any tension on the cords, but not so loose the prop can get them.

  • 1/2 hp units have a blue top, 3/4 have black top.
  • for tie-up, use eyelets where available, otherwise wrap around piling.

Checklist

  • Y-connectors are held in a “down” position via nail in piling (to keep water out).
  • extension cord connections: electrical tape the connection to keep it waterproof.

Inboard group

  • installed, tested, then placed on dock until needed.
  • the cord points toward the outlet to be used.
Table 1 - Along Pier
slip box # box location extension cord size (hp) comment
2 6 slip 8 short 3/4 ensure cord pointing toward slip 8
7 4 slip 7 1/2 blue top
12 6 slip 8 short 3/4
19 12 slip 24 long 3/4
28 3 slip 36 long 3/4
36 3 slip 36 3/4
39 26 slip 40 1/2 blue top
48 7 slip 46 3/4
51 9 slip 51/53 3/4
60 11 slip 58 3/4 "Ice Eater", blows west from dock
63 11 slip 58 long 3/4 blows to ramp from finger pier
dock 3 shore pole extra long 3/4 pole and flange for 'dockmount'

Outboard groups

  • Hung from two outer piles, stay in water all winter.
  • Hang as low as possible, angle upwards, can “surface” in low tides, wind cords around slip rope.
  • Use painted eyes on pilings.
  • 2 units below marked T are located on T dock
Table 2 -
East side –(red paint)
slip box # box location extension cord hp
1T 2 slip 1 short 3/4
13 14 slip 17 long 3/4
29 1 slip 31 long 3/4
45 9 slip 53 long 3/4
Table 3 -
West side –(green paint)
slip box # box location extension cord hp
2T 2 slip 1 short 3/4
16 14 slip 17 long 3/4
30 1 slip 31 long 3/4
46 7 slip 46 3/4

Spring removal

Mark as follows:

  • Power-wash each deicer to remove mud.
  • Tie-wrap cords to unit for stowing/
  • Stow in trailer/

Circuit Boxes

Shore pole is powered via the shore master switch (electrical panel on the shore pole). Switch also powers the shore street light. Dock circuits are marked in panel on dock.

Circuit Breaker Assignments

Table 4 -
DYC Dock Circuits & Deicer Use
Circ# Type Slip Inboard Outboard
1 30A Marine 31 29, 30
2 30A Marine 1T 1, 2
3 30A Marine 36 28, 36
4 30A Marine 7 7
5 30A Marine 41
6 30A Marine 8 2, 12
7 30A Marine 46 48 46
8 20A Standard Spare
9 30A Marine 53 51 45
10 30A Marine 23
11 30A Marine 58 62, 63
12 30A Marine 24 19
13 30A Marine 27
14 30A Marine 17 13, 16
15 30A Marine 27
16 30A Marine 18
17 20A Standard 1 2 10 13 16
18 30A Marine 10
19 20A Standard 17 20 21 24 25
20 30A Marine 6
21 20A Standard 43 44 53 54 61 62
22 30A Marine 5
23 20A Standard 30 31 34 35 38 39
24 30A Marine 9
25 30A Marine 28
26 30A Marine 40 39
? 30A Marine shore

5 "Standard" type boxes are 20A circuits

22 "Marine" type boxes are 30A circuits




Deicers
1/2 hp
3/4 hp

Circuits
bubbler
20A
30A